feat: persist runtime skill metadata

[YYH211]

Summary

• add runtime skill metadata schemas to Skill versions and current Skill cache
• parse child SKILL.md metadata during create/import/copy/deploy and keep currentRuntimeSkills in sync
• show all runtime child skills to HelperBot via the pro submodule update

Tests

• cd packages/service && pnpm exec vitest run -c vitest.config.ts test/core/ai/skill/zipBuilder.test.ts test/core/ai/skill/controller.test.ts test/core/ai/sandbox/application/skillEdit/deploy.test.ts
• cd projects/app && pnpm exec vitest run -c vitest.config.ts test/api/core/ai/skill/import.invalidPackage.test.ts

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	15.85%	1348 / 8500
🔵	Statements	15.8%	1408 / 8911
🔵	Functions	14.1%	286 / 2028
🔵	Branches	13.14%	618 / 4703

File Coverage

No changed files found.

Generated in workflow #1191 for commit 6f38b78 by the Vitest Coverage Report Action

[github-actions]

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