Enforcement counterpart to validate: removes blocks failing validate's own
per-block id/field checks (reused via content/-block-issues, single-sourced)
so federated/imported input can render safely. Tree-wide; distinct from
normalize (empty vs invalid); keeps valid-shell sections, drops invalid ones.
New suite +12 tests (42 suites total).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
