Connector Enhancements & Chat Session Fixes

Full Release Checklist

feat

• Optimized get_connector_info API with Skills metadata query support.
• Completed migration of remaining Connectors to the plugin architecture.

bugfix

• Fixed integration plugin pages displaying incorrect language content.
• Fixed an issue where stopping a session during Proxy command execution showed a false "session running" error when sending new messages.
• Fixed an issue where stopping a session while Ask User Question or Write Document tools were active caused the page to remain in a loading state instead of correctly displaying the stopped status.