Require additional rule fields in schema validation

[kitsuyui]

Summary

• Require kind, rule, and message on each additional_rules entry in the runtime Ajv schema.
• Generate schema.json with required fields so the published schema matches the runtime contract.
• Add regression coverage for missing custom-rule fields and rebuild the checked-in action bundle.

Validation

• bun install --frozen-lockfile
• bun run generate-json-schema
• bun run format
• bun run lint
• bun run test
• bun run build

[github-actions]

gh-counter

• TODO/FIXME: 0 (base: 0, delta: 0)

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Reported by gh-counter

[github-actions]

🎉 Happy commit!

• dogfooding: PR Require additional rule fields in schema validation #819 always celebrates.
• dogfooding: 11a94e18b8fbd65225dd99c5abb4f0dd33eba370 always celebrates.

[github-actions]

Code Metrics Report

	main (1151ca7)	#819 (d85672c)	+/-
Coverage	99.0%	99.0%	0.0%
Code to Test Ratio	1:0.5	1:0.5	+0.0
Test Execution Time	1s	1s	0s

Details

  |                     | main (1151ca7) | #819 (d85672c) | +/-  |
  |---------------------|----------------|----------------|------|
  | Coverage            |          99.0% |          99.0% | 0.0% |
  |   Files             |              5 |              5 |    0 |
  |   Lines             |            107 |            107 |    0 |
  |   Covered           |            106 |            106 |    0 |
+ | Code to Test Ratio  |          1:0.5 |          1:0.5 | +0.0 |
  |   Code              |           1370 |           1386 |  +16 |
+ |   Test              |            743 |            758 |  +15 |
  | Test Execution Time |             1s |             1s |   0s |

Code coverage of files in pull request scope (100.0% → 100.0%)

Files	Coverage	+/-	Status
src/validate.ts	100.0%	0.0%	modified

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Reported by octocov

[github-actions]

gh-build-size

Target	main	#819	+/-
Total action artifacts	23,184,161 B	23,290,052 B	+105,891 B
Runtime bundle	1,132,728 B	1,151,843 B	+19,115 B
Source maps	17,037,154 B	17,122,599 B	+85,445 B
Type declarations	4,973,308 B	4,973,541 B	+233 B

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Reported by gh-build-size