feat: M0 monorepo skeleton with services, clients, deploy and CI

- api/openapi.yaml: contract with /healthz, /readyz, /api/v1/server-info
- services/api (Go): api with oapi-codegen strict server, goose migrations,
  readiness checks for Postgres/Redis; storage-agent stub with internal token
- services/recommender (Python, uv): FastAPI health/readiness/internal status,
  `pipu-rec serve` and `pipu-rec analyze` entrypoints
- packages: generated api-client, core (server URL + server check),
  i18n (ru/en + dictionary check), design-tokens (CSS vars + TS from tokens.json)
- apps/web: Vite + React shell showing server status, language switch
- apps/mobile: Expo (SDK 53) Android app with server connect screen
- deploy: Dockerfiles, compose (prod + dev), nginx template, install/update scripts
- .gitea/workflows: ci.yml and tag-based release.yml (images, signed APK, release)
- scripts/version.mjs: version and Android versionCode from git tag
- tests/fixtures/music/generate.sh: synthetic test library via ffmpeg
- docs: versionCode formula, OpenAPI 3.0.3, dev instructions in README

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

deploy/compose.dev.yaml

@@ -0,0 +1,69 @@
+# Зависимости для локальной разработки.
+#   docker compose -f deploy/compose.dev.yaml up -d            # postgres, redis, meilisearch
+#   docker compose -f deploy/compose.dev.yaml --profile app up  # + api и recommender из исходников
+# Затем: веб — `pnpm --filter @pipu/web dev` (проксирует /api на :8080),
+#        api без docker — см. README, раздел «Разработка».
+name: pipu-dev
+
+services:
+  postgres:
+    image: pgvector/pgvector:pg17
+    environment:
+      POSTGRES_USER: pipu
+      POSTGRES_PASSWORD: pipu
+      POSTGRES_DB: pipu
+    ports: ["5432:5432"]
+    volumes: [pg-data:/var/lib/postgresql/data]
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U pipu -d pipu"]
+      interval: 5s
+      retries: 10
+
+  redis:
+    image: redis:7-alpine
+    ports: ["6379:6379"]
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 5s
+      retries: 10
+
+  meilisearch:
+    image: getmeili/meilisearch:v1.11
+    environment:
+      MEILI_MASTER_KEY: dev-master-key-change-me
+      MEILI_ENV: development
+    ports: ["7700:7700"]
+    volumes: [meili-data:/meili_data]
+
+  api:
+    profiles: [app]
+    build:
+      context: ..
+      dockerfile: services/api/Dockerfile
+      target: api
+    environment:
+      DATABASE_URL: postgres://pipu:pipu@postgres:5432/pipu?sslmode=disable
+      REDIS_URL: redis://redis:6379/0
+      LOG_LEVEL: debug
+    ports: ["8080:8080"]
+    depends_on:
+      postgres: { condition: service_healthy }
+      redis: { condition: service_healthy }
+
+  recommender:
+    profiles: [app]
+    build:
+      context: ..
+      dockerfile: services/recommender/Dockerfile
+    environment:
+      DATABASE_URL: postgresql://pipu:pipu@postgres:5432/pipu
+      REDIS_URL: redis://redis:6379/0
+      INTERNAL_TOKEN: dev-internal-token
+    ports: ["8000:8000"]
+    depends_on:
+      postgres: { condition: service_healthy }
+      redis: { condition: service_healthy }
+
+volumes:
+  pg-data:
+  meili-data: