Ticket #146 - MCP archive tools registration: Added 3 tools (archive_tickets, list_archived_tickets, unarchive_ticket) to mcp-bridge/src/tools/index.ts. Removed singular archive_ticket from Rails mcp_controller.rb (both MCP_TOOLS definition and handle_archive_ticket handler). Also removed archive_ticket from mcp_permissions.yml (orchestrator and reviewer roles). The batch archive_tickets can handle single tickets via array of 1.