Chore & fixes: Add frontmatter validation, resource error registry, tests, and lint fixes.\n\n- Add Zod schema and validator for frontmatter.\n- Add resource-errors registry and expose via tool.\n- Add unit tests and fix TSDoc issues.\n
Chore & fixes: Add frontmatter validation, resource error registry, tests, and lint fixes.\n\n- Add Zod schema and validator for frontmatter.\n- Add resource-errors registry and expose via tool.\n- Add unit tests and fix TSDoc issues.\n