Initial GeoIntel V1 foundation

backend/app/db/__init__.py

@@ -0,0 +1,4 @@
+from .base import Base
+from .session import get_db, get_engine
+
+__all__ = ["Base", "get_db", "get_engine"]

backend/app/db/base.py

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+from sqlalchemy.orm import DeclarativeBase
+
+
+class Base(DeclarativeBase):
+    pass

backend/app/db/session.py

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+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, Session
+
+from app.core.config import get_settings
+
+
+engine = create_engine(get_settings().database_url, pool_pre_ping=True, future=True)
+SessionLocal = sessionmaker(bind=engine, autocommit=False, autoflush=False, future=True)
+
+
+def get_db():
+    db: Session = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()
+
+
+def get_engine():
+    return engine