tods-validate rule catalog

Every rule tods-validate checks against TODS v2.1.0, one permanent page per rule ID. These URLs are what SARIF helpUri, editor hovers, and CI annotations link back to; rule IDs are never renumbered once released, so a link made today keeps working.

Package and file structure (TODS-x1xx)

Field values (TODS-x2xx)

References between files (TODS-x3xx)

Semantic checks (TODS-x4xx)

Coverage (opt-in, informational) (TODS-x5xx)

Advisory (opt-in) (TODS-x6xx)

Operational feasibility (opt-in, not spec-derived) (OPS-x0xx)