Validate API Test Status

Validate coverage markers in library source headers under src/erbsland. Tools, tests, and demo comments do not require coverage markers.

./erbsland-core-tool doc-api-test-status

Use --normalize to normalize legacy marker syntax and remove member-level markers before validation. Review changes before committing; validation alone does not write files.

See Run and Configure Commands for shared invocation options and Documentation Maintenance Reference for the technical contracts.