🔍 Add detailed Supabase connection debugging

- Enhanced error logging with connection details
- Show URL and key info for troubleshooting
- Help diagnose legacy vs JWT key issues

This will help us see exactly why the connection is failing
and whether it's a key format issue or something else.

supabase_client.py

@@ -127,13 +127,23 @@ def create_storage_buckets():
 
 # Test connection
 def test_supabase_connection() -> bool:
-    """Test Supabase connection"""
+    """Test Supabase connection with detailed debugging"""
     try:
+        logger.info(f"Testing connection to: {SUPABASE_URL}")
+        logger.info(f"Using anon key (first 20 chars): {SUPABASE_ANON_KEY[:20]}...")
+        
         client = get_supabase_client()
-        # Try to query the auth users (should work with anon key)
+        
+        # Try a simple REST API call first
+        logger.info("Attempting to connect to Supabase REST API...")
+        
+        # Try to query the trees table (will create it if it doesn't exist)
         result = client.table('trees').select("id").limit(1).execute()
         logger.info("Supabase connection successful")
         return True
+        
     except Exception as e:
-        logger.error(f"Supabase connection failed: {e}")
+        logger.error(f"Supabase connection failed: {type(e).__name__}: {e}")
+        logger.error(f"URL: {SUPABASE_URL}")
+        logger.error(f"Key type: {type(SUPABASE_ANON_KEY)}, Length: {len(SUPABASE_ANON_KEY) if SUPABASE_ANON_KEY else 0}")
         return False