M3a: meetrec-server storage service + automatic upload from the app

- server/meetrec-server: FastAPI storage API (upload bundle with wav/
  txt/srt/json + metadata incl. agenda, list, fetch, download, delete);
  file-based index.json, no database; Docker Compose on port 8090,
  Tailscale-only bind like whisper-server; Ollama env prepared for M3c
  (gemma4:12b, German)
- phone: StorageClient (stdlib multipart upload); RecorderService uploads
  the bundle in the background after the final pass and publishes
  UploadState (Uploading/Done/Error) to the UI
- app: Library URL setting (persisted, default http://100.103.83.12:8090,
  empty disables upload); status line reports upload progress
- storage API validated locally end-to-end: upload, list, metadata,
  download, path-traversal rejected, delete

server/meetrec-server/docker-compose.yml

@@ -0,0 +1,34 @@
+# meetrec-server: storage + orcheststration for meetrec recordings.
+#
+#   docker compose up -d --build
+#
+# Stores recording bundles uploaded by the meetrec apps (wav/txt/srt/json +
+# metadata) and — from M3c on — generates German meeting summaries and
+# agenda coverage via Ollama. Single-user service for a private tailnet;
+# bound only to the Tailscale interface, like whisper-server.
+
+services:
+  meetrec-server:
+    build: .
+    image: meetrec-server:latest
+    container_name: meetrec-server
+    restart: unless-stopped
+
+    environment:
+      # Ollama (used from M3c on for summaries/agenda coverage)
+      OLLAMA_URL: http://100.103.83.12:11435
+      OLLAMA_MODEL: gemma4:12b
+      SUMMARY_LANG: de
+
+    volumes:
+      - ./data:/data
+
+    ports:
+      - "100.103.83.12:8090:8090"   # tailscale-only; see whisper-server notes
+
+    healthcheck:
+      test: ["CMD-SHELL", "python -c \"import urllib.request; urllib.request.urlopen('http://localhost:8090/api/health')\""]
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 15s