Phase 1: data pipeline (Postgres+Redis with in-memory fallback, mock telemetry publisher, WebSocket fan-out, hub /debug page)

- packages/db: postgres.js + ioredis wrapper, StateStore interface with
  InMemory + Postgres implementations, schema migration runner
- apps/api: refactored to use @kerbal-rt/db; live WebSocket hub subscribes
  to store changes and broadcasts to all clients
- apps/tools/mock-telemetry: Node script that generates realistic KSP
  state and POSTs to /api/v1/ingest at 1Hz (uses same keplerian math
  as the live-map renderer)
- apps/hub: new /debug page that connects to /api/v1/live and shows
  the live state
- ksp/README.md: documents Phase 1c (real kRPC bridge) and the two
  implementation options
- Tests: 17 total (5 kepler math, 5 db store, 5 API health/state,
  2 API WebSocket fan-out)

End-to-end verified: mock publisher → API → hub /debug page,
11 snapshots/5s over WebSocket, vessels advancing in mean anomaly.

packages/db/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "@kerbal-rt/db",
+  "version": "0.1.0",
+  "private": true,
+  "description": "Persistence layer: Postgres + Timescale (telemetry) and Redis (pubsub + cache)",
+  "type": "module",
+  "main": "./src/index.ts",
+  "types": "./src/index.ts",
+  "exports": {
+    ".": "./src/index.ts",
+    "./schema": "./src/schema.ts",
+    "./migrate": "./src/migrate.ts"
+  },
+  "scripts": {
+    "typecheck": "tsc --noEmit",
+    "lint": "echo 'no linter yet'",
+    "test": "vitest run",
+    "test:watch": "vitest",
+    "build": "tsc"
+  },
+  "dependencies": {
+    "@kerbal-rt/shared-types": "workspace:*",
+    "ioredis": "^5.4.1",
+    "postgres": "^3.4.4"
+  },
+  "devDependencies": {
+    "typescript": "^5.6.2",
+    "vitest": "^2.1.1"
+  }
+}