- add list_scenario_credentials, add_scenario_credential, remove_scenario_credential tools - add list_all_runs tool (global across all scenarios) - replace all deprecated z.string().uuid() with z.uuid() throughout mcp.service
- add list_scenario_credentials, add_scenario_credential, remove_scenario_credential tools - add list_all_runs tool (global across all scenarios) - replace all deprecated z.string().uuid() with z.uuid() throughout mcp.service