test(ratchet): ban new top-level bug-NNNN test files via identity allowlist

244 one-off bug-* files (~38% of the suite) are grandfathered in
lint-regression-test-names.allowlist.json; new ones fail lint with
fold-into-module guidance, and deletions force allowlist pruning so the
baseline only shrinks. Wired into npm run lint:ci (new single entry point
for every CI lint). Policy documented in docs/TESTING-SUITES.md.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

package.json

@@ -91,6 +91,8 @@
     "pretest:coverage": "npm run build:lib && npm run lint:skill-deps",
     "lint": "eslint . --cache --cache-location node_modules/.cache/eslint/",
     "lint:fix": "eslint . --fix",
+    "lint:ci": "eslint . && npm run lint:skill-deps && node scripts/lint-test-file-count.cjs && node scripts/lint-command-contract.cjs && node scripts/lint-pr-check-project-dir.cjs && npm run lint:legacy-name && node scripts/lint-regression-test-names.cjs",
+    "lint:regression-names": "node scripts/lint-regression-test-names.cjs",
     "lint:descriptions": "node scripts/lint-descriptions.cjs",
     "lint:skill-deps": "node scripts/lint-skill-deps.cjs",
     "lint:test-file-count": "node scripts/lint-test-file-count.cjs",