Fix invalid PostgreSQL MAX_CONNS configuration option

- Remove MAX_CONNS from database OPTIONS as it's not a valid psycopg2 parameter
- Keep isolation_level setting for PostgreSQL optimization
- This resolves ProgrammingError: invalid connection option "MAX_CONNS"

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

netcop_hub/settings.py

@@ -199,11 +199,8 @@ if database_url:
     # Add PostgreSQL optimization settings
     if psycopg2:
         db_config['OPTIONS'] = {
-            'MAX_CONNS': 20,
-            'OPTIONS': {
             'isolation_level': psycopg2.extensions.ISOLATION_LEVEL_READ_COMMITTED,
         }
-        }
     
     # Connection pooling and performance settings
     db_config['CONN_MAX_AGE'] = 600