Fix billing service to get customer data from Stripe if it's missing from DB

- Updated `get_stripe_customer_id` function to accept a Supabase client and handle missing user_id metadata in Stripe customers.
- Added logic to create or update records in the `billing_customers` table based on Stripe customer data.
- Improved logging for customer metadata updates and billing record changes.

backend/services/billing.py

@@ -8,6 +8,8 @@ from fastapi import APIRouter, HTTPException, Depends, Request
 from typing import Optional, Dict, Tuple
 import stripe
 from datetime import datetime, timezone, timedelta
+
+from supabase import Client as SupabaseClient
 from utils.logger import logger
 from utils.config import config, EnvMode
 from services.supabase import DBConnection
@@ -162,7 +164,7 @@ class SubscriptionStatus(BaseModel):
     subscription: Optional[Dict] = None
 
 # Helper functions
-async def get_stripe_customer_id(client, user_id: str) -> Optional[str]:
+async def get_stripe_customer_id(client: SupabaseClient, user_id: str) -> Optional[str]:
     """Get the Stripe customer ID for a user."""
     result = await client.schema('basejump').from_('billing_customers') \
         .select('id') \
@@ -171,6 +173,42 @@ async def get_stripe_customer_id(client, user_id: str) -> Optional[str]:
     
     if result.data and len(result.data) > 0:
         return result.data[0]['id']
+
+    customer_result = await stripe.Customer.search_async(
+        query=f"metadata['user_id']:'{user_id}' OR metadata['basejump_account_id']:'{user_id}'"
+    )
+
+    if customer_result.data and len(customer_result.data) > 0:
+        customer = customer_result.data[0]
+        # If the customer does not have 'user_id' in metadata, add it now
+        if not customer.get('metadata', {}).get('user_id'):
+            try:
+                await stripe.Customer.modify_async(
+                    customer['id'],
+                    metadata={**customer.get('metadata', {}), 'user_id': user_id}
+                )
+                logger.info(f"Added missing user_id metadata to Stripe customer {customer['id']}")
+            except Exception as e:
+                logger.error(f"Failed to add user_id metadata to Stripe customer {customer['id']}: {str(e)}")
+
+        has_active = len((await stripe.Subscription.list_async(
+            customer=customer['id'],
+            status='active',
+            limit=1
+        )).get('data', [])) > 0
+
+        # Create or update record in billing_customers table
+        await client.schema('basejump').from_('billing_customers').upsert({
+            'id': customer['id'],
+            'account_id': user_id,
+            'email': customer.get('email'),
+            'provider': 'stripe',
+            'active': has_active
+        }).execute()
+        logger.info(f"Updated billing_customers record for customer {customer['id']} and user {user_id}")
+
+        return customer['id']
+
     return None
 
 async def create_stripe_customer(client, user_id: str, email: str) -> str:
@@ -676,7 +714,7 @@ async def create_checkout_session(
         # Get or create Stripe customer
         customer_id = await get_stripe_customer_id(client, current_user_id)
         if not customer_id: customer_id = await create_stripe_customer(client, current_user_id, email)
-         
+        
         # Get the target price and product ID
         try:
             price = await stripe.Price.retrieve_async(request.price_id, expand=['product'])