Delegate analyze checkpoints to shared persistence

docs/roadmap/implementation.md

@@ -1,6 +1,6 @@
 # Implementation Plan: Shared Stage Checkpoint Mechanics
 
-Status: Implementation in progress; Stage 1 complete.
+Status: Implementation in progress; Stages 1-2 complete.
 
 ## Scope and Authority
 
@@ -193,7 +193,15 @@ stage behavior. Temporary copying overlap is removed in Stage 3.
 
 ## Stage 2: Migrate Analyze
 
-Status: Pending.
+Status: Complete.
+
+Completion marker (2026-09-22): Replaced analyze's local candidate-copy,
+save, and promotion choreography with the shared checkpoint operation while
+retaining its existing-record requirement, typed validation, path resolution,
+and post-save working and committed collection refresh. Existing recovery,
+selection, invalidation, and rollback coverage required no duplication.
+Verified with `go test ./internal/stage ./internal/app ./internal/manifest`,
+`go test -race ./internal/stage ./internal/app`, and `git diff --check`.
 
 Preparation: `internal/stage/analyze_execution_state.go`,
 `analyze_checkpoint_test.go`, `analyze_failure_test.go`,