Add metrics CLI for project-scoped agent performance records.

Implement record, show, list, and export commands; document session-close
protocol template; extend cheat sheet and agency-framework docs; add CLI tests.

docs/agency-framework.md

@@ -265,6 +265,10 @@ kaizen-agentic metrics optimize [agent] # Run optimizer on project metrics
 `memory brief` includes a `## Performance Summary` when metrics exist (WP-0003
 Part 4).
 
+`memory init` scaffolds `.kaizen/metrics/<agent>/` by default (`--no-metrics` to
+skip). Record outcomes at session close per
+[session-close protocol template](templates/session-close-protocol.md).
+
 ### Fleet correlation
 
 Project metrics correlate with **Helix Forge** fleet session metrics in