Add monitoring PF service

app/db.py

@@ -0,0 +1,31 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import DeclarativeBase, sessionmaker
+
+from app.config import settings
+
+
+engine = create_engine(
+    settings.database_url,
+    connect_args={"check_same_thread": False} if settings.database_url.startswith("sqlite") else {},
+    future=True,
+)
+
+SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False, future=True)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+def init_db():
+    from app import models  # noqa: F401 — registers models on Base
+
+    Base.metadata.create_all(bind=engine)