Fix database connection prepared statement cache size for PgBouncer pool compatibility

app/database.py

@@ -8,12 +8,14 @@ if database_url.startswith("postgresql://"):
     database_url = database_url.replace("postgresql://", "postgresql+asyncpg://", 1)
 
 # Enable connection pooling options since we connect to Supabase
+# Connect with prepared_statement_cache_size=0 to prevent PgBouncer prepared statement conflicts
 engine = create_async_engine(
     database_url,
     echo=settings.DEBUG,
     pool_size=10,
     max_overflow=20,
-    pool_pre_ping=True
+    pool_pre_ping=True,
+    connect_args={"prepared_statement_cache_size": 0}
 )
 
 AsyncSessionLocal = async_sessionmaker(