Initial Switch to V2. Completely Overhauled Backend, Frontend and General Structure.

backend/database/postgres.py

@@ -0,0 +1,16 @@
+from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
+from sqlalchemy.orm import DeclarativeBase
+from config import settings
+
+engine = create_async_engine(settings.database_url, pool_size=10, echo=False)
+AsyncSessionLocal = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+async def get_pg_session() -> AsyncSession:
+    """FastAPI dependency — yields a DB session and closes it after the request."""
+    async with AsyncSessionLocal() as session:
+        yield session