fix: Stop archived companies from waking agents (#7478)

## Thinking Path

> - Paperclip orchestrates AI agents for zero-human companies
> - Each agent has a heartbeat scheduler that wakes it on timers and on
events; every wake spawns an adapter (Claude / Codex / …) run that bills
the operator's subscription
> - When an operator archives a company, the agents inside it remain in
invokable states — the heartbeat scheduler never consults company status
— so timers keep firing and event-driven wakes (comments, mentions,
blockers-resolved, etc.) keep cascading
> - On real deployments this silently drains the operator's
subscription: idle archived companies wake their CEOs hourly, plus any
cross-company event cascade
> - This pull request enforces "archived ⇒ never spawns a run" as a
structural invariant by guarding the wake path AND cascading agent state
on archive/reactivate
> - The benefit is that archived companies stop billing the operator,
and the UI/queue stays consistent with the invariant

## What Changed

- `server/src/services/heartbeat.ts`:
- `enqueueWakeup()` loads the company and short-circuits when status is
not `active`. Background sources (timer, automation, events) write a
`company.inactive` skipped wake and return `null`; explicit user invokes
throw a `conflict` so the UI surfaces the real reason.
- `tickTimers()` joins agents to active companies so the scheduler does
not iterate archived-company agents at all (no skip-row noise).
- `server/src/services/companies.ts`:
- `archive(id, actor?)` pauses runnable agents with `pauseReason =
"company_archived"` inside the transaction (preserving
`pending_approval`, `terminated`, and agents paused for unrelated
reasons), then cancels `queued`/`running` heartbeat runs after the
transaction commits.
- `update(id, data, actor?)` reverses the cascade only for agents whose
`pauseReason === "company_archived"` on the `archived → active`
transition; manually-paused agents stay paused.
- Both methods emit activity-log entries (`company.archived` with
`agentsPaused` + `runsCancelled`, `company.reactivated` with
`agentsRestored`) so the audit trail fires regardless of caller.
- `packages/shared/src/constants.ts` + `server/src/services/budgets.ts`:
add `company_archived` to the legal `PauseReason` union so the
restorable marker is a first-class value.
-
`packages/db/src/migrations/0094_backfill_archived_company_agent_pauses.sql`:
backfill so existing archived-company agents become `paused /
company_archived` (excludes `pending_approval`).
- `ui/src/lib/activity-format.ts`: add the `company.reactivated` label.

## Verification

- `npx vitest run src/__tests__/companies-service.test.ts` — archive
cascade, reactivate cascade, and activity-log entries (with counts) all
pass.
- `npx vitest run
src/__tests__/heartbeat-archived-company-guard.test.ts` — timer +
on-demand + event-wake paths all blocked for archived companies;
`company.inactive` skipped-wake row written; user-initiated wakes throw
`conflict`.
- `pnpm typecheck` — clean.
- Manual repro from the bug description: archive a company, wait an
interval / post a comment on one of its issues, observe zero new
heartbeat runs.

## Risks

- Migration `0094` is a single bulk UPDATE on `agents` joined to
archived `companies`. On large deployments it briefly holds row locks on
archived-company agent rows; should be quick because the predicate is
narrow (`status NOT IN (paused, terminated, pending_approval)` and
`companies.status = 'archived'`).
- New `pauseReason` value (`company_archived`) is opaque to older
clients that only know the previous union. Acceptable because the union
is read as plain text and the contract is sync'd in the same change.
- Behavior change for users: invoking an agent in an archived company
now fails with a conflict instead of silently spawning a run. Intended.

## Model Used

- Claude (Anthropic) — model `claude-opus-4-7` ("Opus 4.7"), Claude Code
CLI, with tool use (Read/Edit/Bash/Grep). No extended thinking mode.

## 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
- [ ] If this change affects the UI, I have included before/after
screenshots — N/A, no UI changes beyond an activity-log label string
- [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

## Related Work

Fixes #1348 (`[Bug] Archived companies still running heartbeats and
consuming tokens`).

Prior attempts and parallel work in this area:

- #1365 and #1429 by @hungdqdesign (March 2026) — both closed without
merging. Same three-layer shape (`tickTimers` / `enqueueWakeup` /
`resumeQueuedRuns` + archive-route cancellation) targeting #1348. Credit
for first publicly proposing the wake-path-guard approach.
- #5865 by @stubbi (May 2026, open) — adds the same `companies.status !=
'archived'` joins to `tickTimers`, `enqueueWakeup`, `resumeQueuedRuns`,
**and** routines `tickScheduledTriggers`, bundled with plugin-table
tenant isolation (`plugin_entities` / `plugin_job_runs` / `plugin_logs`
/ `plugin_webhook_deliveries` get a `companyId` FK with `ON DELETE
CASCADE`). This PR is narrower — it does not touch routines or plugin
tables — but adds the **archive cascade** (pause agents with
`pauseReason = "company_archived"`), the **reactivate reverse**
(un-pause only that subset), the **`company_archived` pause-reason
marker**, and a **backfill migration** for pre-existing archived
companies, which #5865 does not include. Happy to coordinate sequencing
or rebase if #5865 lands first.

packages/db/src/migrations/0094_backfill_archived_company_agent_pauses.sql

@@ -0,0 +1,10 @@
+UPDATE "agents" AS a
+SET
+  "status" = 'paused',
+  "pause_reason" = 'company_archived',
+  "paused_at" = now(),
+  "updated_at" = now()
+FROM "companies" AS c
+WHERE c."id" = a."company_id"
+  AND c."status" = 'archived'
+  AND a."status" NOT IN ('paused', 'terminated', 'pending_approval');

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

@@ -659,6 +659,13 @@
       "when": 1780040470886,
       "tag": "0093_giant_green_goblin",
       "breakpoints": true
+    },
+    {
+      "idx": 94,
+      "version": "7",
+      "when": 1780533900000,
+      "tag": "0094_backfill_archived_company_agent_pauses",
+      "breakpoints": true
     }
   ]
-}
+}

packages/shared/src/constants.ts

@@ -405,7 +405,7 @@ export type RoutineRunStatus = (typeof ROUTINE_RUN_STATUSES)[number];
 export const ROUTINE_RUN_SOURCES = ["schedule", "manual", "api", "webhook"] as const;
 export type RoutineRunSource = (typeof ROUTINE_RUN_SOURCES)[number];
 
-export const PAUSE_REASONS = ["manual", "budget", "system"] as const;
+export const PAUSE_REASONS = ["manual", "budget", "system", "company_archived"] as const;
 export type PauseReason = (typeof PAUSE_REASONS)[number];
 
 export const PROJECT_COLORS = [