ci: verify schema.json is up to date in CI

[kitsuyui]

Summary

Adds a CI step to detect when schema.json drifts from the TypeScript types it is generated from.

Problem: schema.json (the external schema consumed by IDE tooling and JSON linters) and the inline AJV schema in src/validate.ts were managed independently. CI ran lint, test, and build — but never re-ran generate-json-schema. A change to RuleStringPattern in src/interfaces.ts could leave schema.json stale without any CI signal.

Fix: After the build step, re-run generate-json-schema and biome format, then assert no diff in schema.json. If the committed file is out of date, the step fails and the author must update it.

Changes

• .github/workflows/test.yml: add Verify schema.json is up to date step after Verify dist is up to date

Verification

The new step was validated locally:

bun run generate-json-schema
bun run format
git diff --exit-code -- schema.json   # exits 0 (no diff)

Trade-offs

• bun run format runs Biome on all files after schema regeneration, not just schema.json. This is acceptable because the formatter is deterministic — a clean working tree remains clean after formatting.
• The root dual-management (inline schema in validate.ts vs schema.json) is preserved. Eliminating it would require resolveJsonModule: true in tsconfig and further changes; this CI check provides detection with minimal scope.

[github-actions]

🎉 Happy commit!

• dogfooding: PR ci: verify schema.json is up to date in CI #840 always celebrates.
• dogfooding: 34f73a3d4c24e3902f5c321874e325eb19e20c7c always celebrates.

[github-actions]

Code Metrics Report

	main (5e1e87b)	#840 (1b6fc6c)	+/-
Coverage	99.2%	99.2%	0.0%
Code to Test Ratio	1:0.5	1:0.5	0.0
Test Execution Time	2s	1s	-1s

Details

  |                     | main (5e1e87b) | #840 (1b6fc6c) | +/-  |
  |---------------------|----------------|----------------|------|
  | Coverage            |          99.2% |          99.2% | 0.0% |
  |   Files             |              5 |              5 |    0 |
  |   Lines             |            131 |            131 |    0 |
  |   Covered           |            130 |            130 |    0 |
  | Code to Test Ratio  |          1:0.5 |          1:0.5 |  0.0 |
  |   Code              |           1630 |           1630 |    0 |
  |   Test              |            912 |            912 |    0 |
+ | Test Execution Time |             2s |             1s |  -1s |

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Reported by octocov