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.

apps/api/tests/health.test.ts

@@ -2,10 +2,102 @@ import { describe, it, expect } from 'vitest';
 import { app } from '../src/test-app.js';
 
 describe('health', () => {
-  it('returns ok', async () => {
+  it('returns ok with service info', async () => {
     const res = await app.request('/health');
     expect(res.status).toBe(200);
     const body = await res.json();
     expect(body.ok).toBe(true);
+    expect(body.service).toBe('kerbal-rt-api');
+    expect(body.store).toBe('InMemoryStateStore');
+  });
+
+  it('returns 503 NO_DATA when no snapshot has been ingested', async () => {
+    const res = await app.request('/api/v1/state');
+    expect(res.status).toBe(503);
+    const body = await res.json();
+    expect(body.error).toBe(true);
+    expect(body.code).toBe('NO_DATA');
+  });
+
+  it('accepts a valid snapshot and returns it on /api/v1/state', async () => {
+    const snap = {
+      ut: 1,
+      capturedAt: '2026-01-01T00:00:00Z',
+      activeVesselId: null,
+      bodies: [],
+      vessels: [],
+      groundStations: [],
+    };
+    const ingest = await app.request('/api/v1/ingest', {
+      method: 'POST',
+      headers: { 'content-type': 'application/json' },
+      body: JSON.stringify(snap),
+    });
+    expect(ingest.status).toBe(200);
+    const ingestBody = await ingest.json();
+    expect(ingestBody.error).toBe(false);
+    expect(ingestBody.data.ok).toBe(true);
+
+    const state = await app.request('/api/v1/state');
+    expect(state.status).toBe(200);
+    const stateBody = await state.json();
+    expect(stateBody.data.ut).toBe(1);
+  });
+
+  it('rejects malformed snapshots with 400', async () => {
+    const res = await app.request('/api/v1/ingest', {
+      method: 'POST',
+      headers: { 'content-type': 'application/json' },
+      body: JSON.stringify({ broken: 'payload' }),
+    });
+    expect(res.status).toBe(400);
+    const body = await res.json();
+    expect(body.error).toBe(true);
+    expect(body.code).toBe('BAD_PAYLOAD');
+  });
+
+  it('looks up vessels by id', async () => {
+    const snap = {
+      ut: 1,
+      capturedAt: '2026-01-01T00:00:00Z',
+      activeVesselId: 'v-1',
+      bodies: [],
+      vessels: [
+        {
+          id: 'v-1',
+          name: 'Test',
+          type: 'Probe',
+          owner: 'KASA',
+          situation: 'ORBITING',
+          status: 'ACTIVE',
+          orbit: {
+            semiMajorAxis: 7e6,
+            eccentricity: 0,
+            inclination: 0,
+            longitudeOfAscendingNode: 0,
+            argumentOfPeriapsis: 0,
+            meanAnomalyAtEpoch: 0,
+            epoch: 0,
+          },
+          referenceBodyId: 'kerbin',
+          createdAt: '2026-01-01T00:00:00Z',
+          retiredAt: null,
+        },
+      ],
+      groundStations: [],
+    };
+    await app.request('/api/v1/ingest', {
+      method: 'POST',
+      headers: { 'content-type': 'application/json' },
+      body: JSON.stringify(snap),
+    });
+
+    const found = await app.request('/api/v1/vessels/v-1');
+    expect(found.status).toBe(200);
+    const body = await found.json();
+    expect(body.data.name).toBe('Test');
+
+    const missing = await app.request('/api/v1/vessels/does-not-exist');
+    expect(missing.status).toBe(404);
   });
 });