chore(release): v5.13.0 — pipeline hardening batch (M-BUG-11..25 + --subtract)

Batch release of everything since v5.12.5: one new lens mode and 14 real bugs,
all of them dogfooding finds — either from running the plugin against the
maintainer's real machine, or from walking analyze -> plan -> implement ->
rollback end-to-end on a throwaway repo copy.

Minor, not patch. STATE recorded this batch as "fix: only"; the log says
otherwise — e9921d3 ships `optimize --subtract`, a user-facing opt-in flag, so
semver requires a minor. Verified by reading `git log v5.12.5..HEAD` rather than
trusting the note: 11 fix, 1 feat, 8 docs.

Consequence: the planned v5.13 work (model routing, effort awareness, dead
references) now targets v5.14. docs/v5.13-model-routing-effort-deadref-plan.md
keeps its filename so existing references resolve, and says so at the top —
leaving a doc named for a version that shipped something else is exactly the
dead-reference class that plan is about.

Gates, all re-run against ground truth before writing anything:
- node --test 'tests/**/*.test.mjs' -> 1398 pass / 0 fail
- scanners/self-audit.mjs --check-readme -> passed (tests badge 1344 -> 1398;
  the path in STATE said scripts/, which does not exist)
- catalog check-versions.mjs -> 0 ERROR

Counts unchanged: scanners 16, agents 7, commands 21, hooks 4.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AA5LT1UaDzctNkMi414qzA

.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "config-audit",
   "description": "Multi-agent workflow for analyzing, reporting, and optimizing Claude Code configuration across your entire machine",
-  "version": "5.12.5",
+  "version": "5.13.0",
   "author": {
     "name": "Kjell Tore Guttormsen"
   },