chore(devops): project skeleton — uv, docker compose, Makefile, CI

One Postgres with isolated identity/clinical databases and roles (ADR-003),
FastAPI /health, Streamlit placeholder, typed settings with offline defaults.

Refs #1

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

app/main.py

@@ -0,0 +1,29 @@
+"""Application entrypoint: FastAPI API (+ scheduler and Telegram bot once implemented)."""
+
+import logging
+from collections.abc import AsyncGenerator
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+
+from app.config import get_settings
+
+# Logs carry only tokens, states and event codes — never PII or raw message text.
+logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(name)s %(message)s")
+log = logging.getLogger("app")
+
+
+@asynccontextmanager
+async def lifespan(_: FastAPI) -> AsyncGenerator[None, None]:
+    settings = get_settings()
+    log.info("startup llm_provider=%s demo_clock=%s", settings.llm_provider, settings.demo_clock)
+    # DB init (#6), scheduler (#13) and Telegram bot (#11) hook in here.
+    yield
+
+
+app = FastAPI(title="PTSRaiAgent API", version="0.1.0", lifespan=lifespan)
+
+
+@app.get("/health")
+async def health() -> dict[str, str]:
+    return {"status": "ok"}