feat(gpu-box): news-ingester migrated, Mini compose drops the service block

Phase 2f-2. RSS/Atom ingester (15-min tick → mana_platform.news.curated_articles)
moved to GPU-Box. Service has zero hot-path coupling, all the writes go
cross-LAN to Mini-postgres analog to the Glitchtip pattern.

Two implementation gotchas worth recording:

1. cross-arch image transfer doesn't work. Saved news-ingester:local
   from the Mini (Apple M4 → linux/arm64), tried `docker load` on the
   GPU-Box (linux/amd64) and got 'exec format error' on every restart.
   Native build on the GPU-Box was the only path forward.

2. The original services/news-ingester/Dockerfile assumes
   pnpm-workspace state from prior builds (no COPY for packages/shared-rss
   in the build context). Fresh builds error with
   ERR_PNPM_WORKSPACE_PKG_NOT_FOUND.

Workaround: a GPU-Box-specific Dockerfile at infrastructure/news-ingester/
that vendors shared-rss into the build via a workspace:* → file:ref
sed swap. Build context is the repo root (sparse-clone provides
packages/shared-rss + services/news-ingester). The Mini-side Dockerfile
stays untouched so existing CD builds aren't disturbed.

Mini-side: container stopped + removed from docker-compose.macmini.yml,
running container count 44 → 39.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

infrastructure/docker-compose.gpu-box.yml

@@ -493,6 +493,36 @@ services:
   # lebt jetzt in mana-monorepo's infrastructure/verdaccio/config.yaml,
   # sparse-clone trägt das Verzeichnis auf der GPU-Box ein.
   # ============================================
+  # ============================================
+  # Phase 2f-2 — news-ingester (2026-05-07)
+  # Background article-ingester — Bun-Service mit 15-min-Tick. Schreibt
+  # in Mini-Postgres mana_platform via LAN. Reine Background-Last,
+  # null Hot-Path-Coupling.
+  # ============================================
+  news-ingester:
+    # GPU-Box-spezifischer Build (services/news-ingester/Dockerfile ist
+    # nicht workspace-aware; der hier vendored shared-rss als file: ref).
+    # Cross-arch: GPU-Box ist x86_64, Mini ist arm64 — Image-Transfer
+    # via docker save/load würde "exec format error" werfen.
+    build:
+      context: /srv/mana/source
+      dockerfile: infrastructure/news-ingester/Dockerfile
+    image: news-ingester:gpu-box
+    container_name: news-ingester
+    restart: unless-stopped
+    environment:
+      TZ: Europe/Berlin
+      PORT: 3066
+      DATABASE_URL: postgresql://postgres:${POSTGRES_PASSWORD}@192.168.178.131:5432/mana_platform
+      TICK_INTERVAL_MS: '900000'
+      RUN_ON_STARTUP: 'true'
+    healthcheck:
+      test: ['CMD', 'bun', '-e', "fetch('http://127.0.0.1:3066/health').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"]
+      interval: 120s
+      timeout: 10s
+      retries: 3
+      start_period: 30s
+
   verdaccio:
     image: verdaccio/verdaccio:6
     container_name: mana-verdaccio