TASK-001: Setup FastAPI project structure

app/db/__init__.py

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+"""Database module package."""

app/db/database.py

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+"""Database connection and session management."""
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker, DeclarativeBase
+from app.core.config import settings
+
+# Create engine
+engine = create_engine(
+    settings.DATABASE_URL,
+    connect_args={"check_same_thread": False} if "sqlite" in settings.DATABASE_URL else {},
+)
+
+# Create session factory
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+
+class Base(DeclarativeBase):
+    """SQLAlchemy declarative base class."""
+    pass
+
+
+def get_db():
+    """Dependency to get database session."""
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()