refactor(#651): consolidate verification-status routing into one queryable seam (#755)

* refactor(#651): consolidate verification-status routing into one queryable seam

The passed/gaps_found/human_needed verification status was re-encoded as
bare strings across three prose surfaces (gsd-verifier emits, execute-phase
routes, ship gates), each independently deciding the per-status next action
with no parity coupling — the DEFECT.GENERATIVE-FIX class.

Give the enum one home: src/verification.cts (-> bin/lib/verification.cjs)
exposing `gsd_run query verification.status <phaseDir>` returning a typed
{status, next_action, next_command}. ship.md and execute-phase.md now consume
the query instead of re-deriving the routing in prose; gsd-verifier.md points
at the shared vocabulary as the single emitter (values unchanged).

Also fixes the latent broad-grep status misread (DEFECT.FRONTMATTER-SCALAR-
BROAD-GREP): execute-phase.md read `grep "^status:"` over the whole report, so
a body `status:` line could misroute a valid phase. Extraction is now
frontmatter-scoped in one place. A parity test fails if a verifier status
gains no route. Lands the two CONTEXT.md DEFECT entries captured on the issue.

Closes #651

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* chore(#651): set changeset pr to 755

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

eslint.config.mjs

@@ -96,6 +96,8 @@ export default tseslint.config(
       'gsd-core/bin/lib/config-types.cjs',
       'gsd-core/bin/lib/phases-command-router.cjs',
       'gsd-core/bin/lib/verify-command-router.cjs',
+      'gsd-core/bin/lib/verification.cjs',
+      'gsd-core/bin/lib/verification-command-router.cjs',
       'gsd-core/bin/lib/init-command-router.cjs',
       'gsd-core/bin/lib/agent-command-router.cjs',
       'gsd-core/bin/lib/task-command-router.cjs',