fix(ci): regenerate PLAN.md catalog after adding plan 2607051919

The new plan file was not reflected in the PLAN.md <?catalog?> section,
causing MDS019 failures on both mdsmith-fixed-version and mdsmith-check CI jobs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015qYnUAc5XUmrQBwiEYyd4j

Author: claude

PLAN.md

@@ -242,7 +242,7 @@ footer: |
 | 2607040635 | ⛔     | opus   | [Add mdsmith move: move a file and rewrite every incoming reference](plan/2607040635_move-command.md)                                                   |
 | 2607040822 | 🔲     | opus   | [Refactor engine redesign: unify move and rename behind one Plan, across CLI, LSP, and WASM hosts](plan/2607040822_refactor-move-rename-redesign.md)    |
 | 2607051918 | ✅     | sonnet | [Export wordlist.Dedup and remove the identical dedupStrings copy in internal/config](plan/2607051918_arch-fix-wordlist-config-dedup.md)                |
-| 2607051919 | 🔲     | sonnet | [Add dedicated unit tests for helpers added by the word-list and reflow features](plan/2607051919_arch-fix-new-helper-tests.md)                         |
+| 2607051919 | ✅     | sonnet | [Add dedicated unit tests for helpers added by the word-list and reflow features](plan/2607051919_arch-fix-new-helper-tests.md)                         |
 | 2607051920 | ✅     | sonnet | [Consolidate duplicated leading-space/blank-line rule helpers into internal/rules/astutil](plan/2607051920_arch-fix-rule-whitespace-helpers-astutil.md) |
 | 2607071642 | 🔲     | sonnet | [Single-file metric extraction via `mdsmith metrics get` (readability first)](plan/2607071642_extractable-file-metrics.md)                              |
 | 2607082048 | 🔲     | sonnet | [Placeholder token for APM `${input:name}` prompt parameters](plan/2607082048_apm-input-placeholder-token.md)                                           |