feat(mcp): record per-backend initialization failures in metrics - #2733

feat(mcp): record per-backend initialization failures in metrics#2733

sangkyoonnam wants to merge 5 commits into

theagentrouter:maintheagentrouter/agent-router:mainfrom

sangkyoonnam:fix/2724-mcp-backend-init-failure-metricssangkyoonnam/agent-router:fix/2724-mcp-backend-init-failure-metricsCopy head branch name to clipboard