feat(logging): ~2-month container rotation, ISO timestamps, level names

Operator asked for bounded container logs (~2 months of history), human-
readable timestamps, and clarity on levels. Levels already existed (LOG_LEVEL
env → pino, default info; warn+ teed into app_logs, queryable at /setup/logs)
— the "level":30 / epoch-ms "time" in docker logs were pino defaults.

- server.ts logger: stamp ISO-8601 UTC time (timestamp fn) and level NAMES
  (formatters.level) so `docker logs` reads human.
- log-service.ts pinoDbStream: accept BOTH level encodings (name + numeric) —
  the label switch would otherwise have silently stopped warn+ persistence
  into app_logs. New log-service-stream.test.ts pins both encodings, the
  info-stays-stdout-only rule, and the never-throws fallback.
- docker-compose.prod.yml: json-file caps resized from 10m×3 (≈30 MB — days,
  not months) to ≈2 months by volume: server 20m×30, vision 20m×10, proxy
  10m×5. json-file rotates by SIZE; time-based isn't a driver feature —
  comment says to revisit if `docker logs` holds under ~60 days.
- app_logs retention default aligned 30→60 days (LOG_RETENTION_DAYS still
  overrides).

Wiki: app-logs.md gains the container-log store section (rotation, format,
LOG_LEVEL knob) + retention update; log.md entry.

Suite 282 green.

Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V

apps/server/src/server.ts

@@ -71,7 +71,14 @@ export async function buildServer(opts: BuildOptions = {}): Promise<FastifyInsta
   const logService = new LogService(db);
   const app = Fastify({
     logger: {
+      // Level knob: trace|debug|info|warn|error|fatal (pino). Default info; a booth
+      // being diagnosed can run LOG_LEVEL=debug without a code change.
       level: process.env.LOG_LEVEL ?? "info",
+      // Container logs are read by humans (`docker logs` / Komodo), so stamp
+      // ISO-8601 UTC instead of pino's epoch-ms, and level NAMES instead of the
+      // numeric codes (30/40/50). pinoDbStream accepts both encodings.
+      timestamp: () => `,"time":"${new Date().toISOString()}"`,
+      formatters: { level: (label) => ({ level: label }) },
       stream: pinoDbStream(logService, process.stdout),
     },
   });