Clear the shared pipeline dependency blocker

docs/roadmap/implementation.md

@@ -844,9 +844,10 @@ The final handoff must:
 
 ## Progress Notes
 
-No implementation stages have begun. Record only concise stage commit hashes
-and blockers here during execution; preserve detailed evidence in the stage
-commits and final handoff.
+Stages 1 through 4 and the dependency-publication checkpoint are complete.
+Resume at Stage 5. Continue recording only concise stage commit hashes and
+blockers here; preserve detailed evidence in the stage commits and final
+handoff.
 
 - [x] Stage 1 complete — `ansible-role-audita` commit `66ebea9`; full
   integration, native validation, and clean repeats passed. No deviations.
@@ -858,9 +859,6 @@ commits and final handoff.
   deviations.
 - [x] Stage 4 complete — `ansible-role-narratio` commit `eeb1105`; full
   integration, native validation, and clean repeats passed. No deviations.
-- Blocked before Stage 5: fresh canonical-origin fetches cannot resolve
-  Audita `66ebea9a47ce82bfdbdc5e2855f3dfaaff8e2a16`, Notarius
-  `e9ae2dc34023e1e8462bf0991de62b97d8c0e0ee`, Scriptorium
-  `8b4c86e48e7d8655e479b26dc510bf01683a0c8f`, or Narratio
-  `eeb1105590e638c1f46b42c98a5dbbce4ddeea86`. Publication is required;
-  implementation does not push.
+- [x] Dependency publication checkpoint complete — the four Stage 1–4 commits
+  are available from their canonical `origin/main` branches at the exact
+  immutable revisions listed above. Stage 5 may begin.