chore(ultraplan-local): release v3.4.1 [skip-docs]

Step 14 of v3.4.1 plan — final release commit.

CHANGELOG.md: new top section [3.4.1] - 2026-05-04 documenting
/ultracontinue-local hot-fix (Bugs 1-4 + ESM/CJS regression +
plugin.json description drift) and the SC-6 doc-rydding sweep.

README.md: version badge 3.4.0 -> 3.4.1.

Marketplace root README.md: ultraplan-local entry header bumped to
v3.4.1.

prior commits in this release:
- 1da4f3f docs(ultraplan-local): Handover 7 § Lifecycle (SC-5)
- 6bca3fb docs(ultraplan-local): remove ultra-cc-architect references (SC-6)
- 561ad5a chore(ultraplan-local): bump v3.4.1 + plugin.json description drift fix

The user-facing docs were already updated in the prior commits, so
[skip-docs] applies here.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

README.md

@@ -73,7 +73,7 @@ Key commands: `/config-audit posture`, `/config-audit feature-gap`, `/config-aud
 
 ---
 
-### [Ultra {brief | research | plan | execute | review | continue} - local](plugins/ultraplan-local/) `v3.4.0`
+### [Ultra {brief | research | plan | execute | review | continue} - local](plugins/ultraplan-local/) `v3.4.1`
 
 Deep requirements gathering, research, implementation planning, self-verifying execution, independent post-hoc review, and zero-friction multi-session resumption with specialized agent swarms, adversarial review, and failure recovery. Six-command (brief, research, plan, execute, review, continue) universal pipeline.