feat(infra): каркас проекта — uv, ruff, mypy, pytest, Docker Compose

- pyproject: Python 3.12, зависимости ADR-009, ruff/mypy strict/pytest/coverage
- app/: точка входа-заглушка с graceful shutdown по SIGTERM
- Dockerfile: multi-stage, uv, non-root (uid 10001), git+ssh для коммитов (#9);
  apt по HTTPS — в некоторых сетях обычный HTTP к deb.debian.org заблокирован
- docker-compose: bot + postgres 16, healthcheck, лимиты памяти, ротация логов
- Makefile: install/lint/fmt/test/cov/up/down/logs/ps; .env.example

Refs #3

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

docker-compose.yml

@@ -0,0 +1,39 @@
+# Local / any-host stack: `make up`. Server overrides — infra/deploy/docker-compose.server.yml (#12).
+services:
+  bot:
+    build: .
+    env_file: .env
+    environment:
+      DATABASE_URL: postgresql+asyncpg://tgit:${POSTGRES_PASSWORD:-tgit}@postgres:5432/tgit
+    depends_on:
+      postgres:
+        condition: service_healthy
+    restart: unless-stopped
+    mem_limit: 256m
+    labels:
+      tgit.managed: "true"
+    logging:
+      options: { max-size: "10m", max-file: "3" }
+
+  postgres:
+    image: postgres:16-alpine
+    environment:
+      POSTGRES_USER: tgit
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-tgit}
+      POSTGRES_DB: tgit
+    volumes:
+      - pgdata:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U tgit -d tgit"]
+      interval: 3s
+      timeout: 3s
+      retries: 20
+    restart: unless-stopped
+    mem_limit: 256m
+    labels:
+      tgit.managed: "true"
+    logging:
+      options: { max-size: "10m", max-file: "3" }
+
+volumes:
+  pgdata: