Add low-trust review containment (#7530)

## Thinking Path

> - Paperclip is a control plane for AI-agent companies, so execution
policy and trust boundaries are part of the product's safety contract.
> - Low-trust review work needs narrower authority than normal
same-company agents because hostile PRs, comments, attachments, and
generated output can carry prompt-injection payloads.
> - The current V1 shape gives trusted workers broad company context,
which is useful for normal execution but too permissive for a reviewer
assigned to hostile content.
> - This branch adds a `low_trust_review` preset, source-trust tagging,
route-level containment, and quarantine handling so low-trust output
does not automatically flow into higher-trust wake context.
> - The branch has been rebased onto current `origin/master`, and the
low-trust migration was renumbered to `0097_low_trust_source_trust.sql`
to avoid collisions with existing `0091` through `0096` migrations.
> - Greptile feedback was addressed by tightening low-trust detection,
preserving project-level trust policy checks, fixing issue-kind
promotion lookup, removing duplicate post-lease isolation assertion,
documenting fail-closed source-trust behavior, bounding ancestry checks,
enforcing runtime issue context for CEOs, awaiting accepted-plan monitor
authorization, and making low-trust issue source-trust tagging atomic.
> - The benefit is a first production slice of deny-by-default review
containment with regression coverage for the main control-plane pivot
surfaces.

Fixes #7531.

## What Changed

- Added shared trust-policy types and validators, plus
database/source-trust fields for issues, comments, documents, and work
products.
- Implemented server enforcement for low-trust issue scope, agent
self-view redaction, secret/plugin/runtime denial paths, promotion
checks, and quarantined continuation/wake context.
- Added focused low-trust regression tests for resolver behavior, source
trust, route authorization, heartbeat preflight ordering, runtime
containment, and quarantine redaction.
- Added board UI affordances for selecting/reviewing the low-trust
preset and surfacing source-trust badges in relevant issue views.
- Added `doc/LOW-TRUST-PRESETS.md`, updated
`doc/SPEC-implementation.md`, and committed the low-trust review
contract plan under `doc/plans/`.
- Rebasing note: the original `0097_low_trust_source_trust.sql`
migration was renamed to `0097_low_trust_source_trust.sql`; the SQL uses
`ADD COLUMN IF NOT EXISTS` so users who already applied the old-numbered
migration are not broken by the renumbered migration.

## Verification

- Rebased branch onto current `origin/master` and force-pushed with
lease to `origin/PAP-10211-low-trust-agent` at head `2719f31e3`.
- Confirmed the PR diff does not include `pnpm-lock.yaml` or
`.github/workflows` changes.
- Resolved upstream UI/comment conflicts by preserving deleted-comment
tombstone behavior and low-trust source-trust badges/metadata.
- Renumbered the low-trust source-trust migration to
`0097_low_trust_source_trust.sql`; the SQL uses `ADD COLUMN IF NOT
EXISTS` so users who already applied an old-numbered copy are not
broken.
- `pnpm exec vitest run ui/src/lib/issue-chat-messages.test.ts
server/src/__tests__/heartbeat-workspace-session.test.ts`
- `pnpm exec vitest run server/src/__tests__/source-trust.test.ts
server/src/__tests__/workspace-runtime-service-authz.test.ts
ui/src/lib/trust-policy-ui.test.ts
ui/src/components/TrustPresetSection.test.tsx`
- `pnpm run typecheck:build-gaps`
- `git diff --check`
- GitHub checks pass on head `2719f31e3`: build, typecheck/release
registry, general tests, serialized server suites, e2e, canary, verify,
policy/review, Socket, and Snyk.
- Greptile Review passes with Confidence Score 5/5 and zero unresolved
Greptile review threads.
- No design screenshots/images were added because the task explicitly
says not to add them unless they are specifically part of the work.

## Risks

- Medium risk: this touches shared trust-policy contracts, server
authorization paths, heartbeat context generation, migration metadata,
and UI preset controls.
- Low-trust containment is intentionally deny-by-default; legitimate
future review workflows may need explicit allowlisted exceptions.
- Plugin/runtime/security surfaces are broad, so regression tests cover
the current known routes but future integrations must route through the
same containment layer.
- The PR is ready for review; GitHub checks are green and Greptile is
5/5.

> For core feature work, check [`ROADMAP.md`](ROADMAP.md) first and
discuss it in `#dev` before opening the PR. Feature PRs that overlap
with planned core work may need to be redirected — check the roadmap
first. See `CONTRIBUTING.md`.

## Model Used

- OpenAI Codex, GPT-5 coding agent, tool-enabled shell and GitHub CLI
workflow.

## Checklist

- [x] I have included a thinking path that traces from project context
to this change
- [x] I have specified the model used (with version and capability
details)
- [x] I have checked ROADMAP.md and confirmed this PR does not duplicate
planned core work
- [x] I have run tests locally and they pass
- [x] I have added or updated tests where applicable
- [x] UI changes are covered by focused tests; no screenshots were added
per task instruction not to add design images unless specifically
required
- [x] I have updated relevant documentation to reflect my changes
- [x] I have considered and documented any risks above
- [x] I will address all Greptile and reviewer comments before
requesting merge

---------

Co-authored-by: Paperclip <noreply@paperclip.ing>

packages/db/src/migrations/0097_low_trust_source_trust.sql

@@ -0,0 +1,4 @@
+ALTER TABLE "issues" ADD COLUMN IF NOT EXISTS "source_trust" jsonb;--> statement-breakpoint
+ALTER TABLE "issue_comments" ADD COLUMN IF NOT EXISTS "source_trust" jsonb;--> statement-breakpoint
+ALTER TABLE "documents" ADD COLUMN IF NOT EXISTS "source_trust" jsonb;--> statement-breakpoint
+ALTER TABLE "issue_work_products" ADD COLUMN IF NOT EXISTS "source_trust" jsonb;

packages/db/src/migrations/meta/_journal.json

@@ -680,6 +680,13 @@
       "when": 1780507597455,
       "tag": "0096_document_annotation_issue_comment_links",
       "breakpoints": true
+    },
+    {
+      "idx": 97,
+      "version": "7",
+      "when": 1780534000000,
+      "tag": "0097_low_trust_source_trust",
+      "breakpoints": true
     }
   ]
 }

packages/db/src/schema/documents.ts

@@ -1,4 +1,5 @@
-import { pgTable, uuid, text, integer, timestamp, index } from "drizzle-orm/pg-core";
+import { pgTable, uuid, text, integer, timestamp, index, jsonb } from "drizzle-orm/pg-core";
+import type { SourceTrustMetadata } from "@paperclipai/shared";
 import { companies } from "./companies.js";
 import { agents } from "./agents.js";
 
@@ -19,6 +20,7 @@ export const documents = pgTable(
     lockedAt: timestamp("locked_at", { withTimezone: true }),
     lockedByAgentId: uuid("locked_by_agent_id").references(() => agents.id, { onDelete: "set null" }),
     lockedByUserId: text("locked_by_user_id"),
+    sourceTrust: jsonb("source_trust").$type<SourceTrustMetadata | null>(),
     createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
     updatedAt: timestamp("updated_at", { withTimezone: true }).notNull().defaultNow(),
   },

packages/db/src/schema/issue_comments.ts

@@ -1,4 +1,9 @@
-import type { IssueCommentAuthorType, IssueCommentMetadata, IssueCommentPresentation } from "@paperclipai/shared";
+import type {
+  IssueCommentAuthorType,
+  IssueCommentMetadata,
+  IssueCommentPresentation,
+  SourceTrustMetadata,
+} from "@paperclipai/shared";
 import { pgTable, uuid, text, timestamp, index, jsonb } from "drizzle-orm/pg-core";
 import { companies } from "./companies.js";
 import { issues } from "./issues.js";
@@ -23,6 +28,7 @@ export const issueComments = pgTable(
     deletedByAgentId: uuid("deleted_by_agent_id").references(() => agents.id, { onDelete: "set null" }),
     deletedByUserId: text("deleted_by_user_id"),
     deletedByRunId: uuid("deleted_by_run_id").references(() => heartbeatRuns.id, { onDelete: "set null" }),
+    sourceTrust: jsonb("source_trust").$type<SourceTrustMetadata | null>(),
     createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
     updatedAt: timestamp("updated_at", { withTimezone: true }).notNull().defaultNow(),
   },

packages/db/src/schema/issue_work_products.ts

@@ -7,6 +7,7 @@ import {
   timestamp,
   uuid,
 } from "drizzle-orm/pg-core";
+import type { SourceTrustMetadata } from "@paperclipai/shared";
 import { companies } from "./companies.js";
 import { executionWorkspaces } from "./execution_workspaces.js";
 import { heartbeatRuns } from "./heartbeat_runs.js";
@@ -36,6 +37,7 @@ export const issueWorkProducts = pgTable(
     healthStatus: text("health_status").notNull().default("unknown"),
     summary: text("summary"),
     metadata: jsonb("metadata").$type<Record<string, unknown>>(),
+    sourceTrust: jsonb("source_trust").$type<SourceTrustMetadata | null>(),
     createdByRunId: uuid("created_by_run_id").references(() => heartbeatRuns.id, { onDelete: "set null" }),
     createdAt: timestamp("created_at", { withTimezone: true }).notNull().defaultNow(),
     updatedAt: timestamp("updated_at", { withTimezone: true }).notNull().defaultNow(),

packages/db/src/schema/issues.ts

@@ -17,6 +17,7 @@ import { companies } from "./companies.js";
 import { heartbeatRuns } from "./heartbeat_runs.js";
 import { projectWorkspaces } from "./project_workspaces.js";
 import { executionWorkspaces } from "./execution_workspaces.js";
+import type { SourceTrustMetadata } from "@paperclipai/shared";
 
 export const issues = pgTable(
   "issues",
@@ -61,6 +62,7 @@ export const issues = pgTable(
       .references((): AnyPgColumn => executionWorkspaces.id, { onDelete: "set null" }),
     executionWorkspacePreference: text("execution_workspace_preference"),
     executionWorkspaceSettings: jsonb("execution_workspace_settings").$type<Record<string, unknown>>(),
+    sourceTrust: jsonb("source_trust").$type<SourceTrustMetadata | null>(),
     startedAt: timestamp("started_at", { withTimezone: true }),
     completedAt: timestamp("completed_at", { withTimezone: true }),
     cancelledAt: timestamp("cancelled_at", { withTimezone: true }),