Fix SQLAlchemy reserved attribute error

- Renamed 'metadata' column to 'payment_metadata' in Payment model
- Updated database migration to use new column name
- Updated StripeService to use payment_metadata field
- Fixed application startup issue caused by reserved attribute name

alembic/versions/001_initial_migration.py

@@ -28,7 +28,7 @@ def upgrade() -> None:
         sa.Column("customer_email", sa.String(), nullable=True),
         sa.Column("customer_name", sa.String(), nullable=True),
         sa.Column("description", sa.String(), nullable=True),
-        sa.Column("metadata", sa.String(), nullable=True),
+        sa.Column("payment_metadata", sa.String(), nullable=True),
         sa.Column(
             "created_at",
             sa.DateTime(timezone=True),

app/models/payment.py

@@ -14,7 +14,7 @@ class Payment(Base):
     customer_email = Column(String, index=True)
     customer_name = Column(String)
     description = Column(String)
-    metadata = Column(String)  # JSON string for additional data
+    payment_metadata = Column(String)  # JSON string for additional data
     created_at = Column(DateTime(timezone=True), server_default=func.now())
     updated_at = Column(DateTime(timezone=True), onupdate=func.now())
     is_webhook_processed = Column(Boolean, default=False)

app/services/stripe_service.py

@@ -71,7 +71,7 @@ class StripeService:
             customer_email=customer_email,
             customer_name=customer_name,
             description=payment_intent.description,
-            metadata=json.dumps(payment_intent.metadata)
+            payment_metadata=json.dumps(payment_intent.metadata)
             if payment_intent.metadata
             else None,
         )