Finalize artifact workflow documentation

docs/internal/stage-analyze.md

@@ -31,7 +31,9 @@ Supported source families:
   executable, completes successfully with no outputs and records explanatory
   metadata. This is not an explicit self-skip: both manifests record success,
   satisfy publish's prerequisite, and an ordinary later run reuses the result
-  until forced.
+  while the effective set remains empty. Enabling or selecting an artifact
+  later makes missing versioned evidence non-resumable and schedules it without
+  requiring force.
 - builds a runtime artifact catalog containing built-ins, configured artifacts,
   and configured extraction lanes. Extraction availability is hydrated only
   from compatible successful extraction evidence.