Implement Phase 1 task 1.8 (Redis Streams publisher + main wiring)

- Bounded in-memory queue (default 10000); overflow throws PublishOverflowError
  so the framing layer skips ACK and the device retransmits.
- Background worker drains via XADD with MAXLEN ~ approximate trimming.
- JSON serialization with sentinel encoding for bigint/Buffer/Date; correctly
  handles Buffer.prototype.toJSON firing before the replacer.
- AdapterContext.publish(position, codec) with codec-label closure at dispatch
  in adapters/teltonika/index.ts; zero changes to the three codec parsers.
- connectRedis with retry-on-startup; main.ts wires the full pipeline.
- installGracefulShutdown stubbed (full hardening in task 1.12).
- 19 new tests (17 unit + 2 Docker-conditional integration). Total 81 passing.

.planning/phase-1-telemetry/08-redis-publisher.md

@@ -1,7 +1,7 @@
 # Task 1.8 — Redis Streams publisher & main wiring
 
 **Phase:** 1 — Inbound telemetry
-**Status:** ⬜ Not started
+**Status:** 🟩 Done
 **Depends on:** 1.2, 1.3, 1.4, 1.5, 1.6, 1.7
 **Wiki refs:** `docs/wiki/entities/redis-streams.md`, `docs/wiki/concepts/position-record.md`
 
@@ -111,4 +111,16 @@ main().catch((err) => { console.error(err); process.exit(1); });
 
 ## Done
 
-(Fill in once complete.)
+Implemented in task 1.8. Key deviations from spec:
+
+1. **Buffer.toJSON() trap** — `Buffer.prototype.toJSON()` converts Buffer to `{type:'Buffer',data:[...]}` before the `JSON.stringify` replacer sees it. The replacer checks both `instanceof Uint8Array` (direct calls) and the `{type:'Buffer',data:[]}` shape (JSON.stringify path) to handle both cases. The spec's `Buffer.isBuffer(value)` check would not work here; documented in `publish.ts`.
+
+2. **Codec label plumbing** — Chose Option B (handler wrapper), not a signature change to `CodecHandlerContext.publish`. `AdapterContext.publish` was updated to `(position, codec) => Promise<void>`; the framing layer (`index.ts`) builds a `(pos) => ctx.publish(pos, codecLabel)` closure at dispatch time. Codec parsers (codec8.ts, codec8e.ts, codec16.ts) are unchanged.
+
+3. **`connectRedis` exported from `publish.ts`** — co-located with publisher for testability; spec showed it in main.ts but extraction is cleaner.
+
+4. **Integration tests skipped (Docker unavailable)** — Two integration tests in `test/publish.integration.test.ts` log `"Docker not available — skipping"` and pass without executing. Will run in CI (task 1.11).
+
+5. **`startMetricsServer` omitted from main.ts** — Task 1.10 is out of scope; placeholder metrics (stub inc/observe) used per spec. The `main.ts` skeleton in the spec included `startMetricsServer` — deferred.
+
+Test count: 81 (was 62, +19).