first commit

backend/app/routers/health.py

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+from fastapi import APIRouter
+from sqlalchemy import text
+from sqlalchemy.exc import OperationalError
+
+from app.config import settings
+from app.database import engine
+from app.mongo import mongo_client, mongo_db
+
+router = APIRouter(tags=["health"])
+
+
+@router.get("/health")
+async def health_check() -> dict[str, str]:
+    db_status = "disconnected"
+    try:
+        with engine.connect() as conn:
+            conn.execute(text("SELECT 1"))
+        db_status = "sqlite" if settings.is_sqlite else "connected"
+    except OperationalError:
+        pass
+
+    mongo_status = "disconnected"
+    if mongo_client is not None and mongo_db is not None:
+        try:
+            await mongo_client.admin.command("ping")
+            mongo_status = "connected"
+        except Exception:
+            mongo_status = "disconnected"
+
+    overall = "ok" if db_status != "disconnected" and mongo_status == "connected" else "degraded"
+
+    return {
+        "status": overall,
+        "service": "silos-api",
+        "database": db_status,
+        "mongodb": mongo_status,
+        "hint": ""
+        if mongo_status == "connected"
+        else "Start MongoDB with: docker compose up mongo -d",
+    }