fix(#3606): validate hook-kind coverage at call sites and dispatch generically (#3687)

* test(#3606): pin hook-kind coverage in the wired guard

* fix(#3606): validate hook-kind coverage at call sites and dispatch generically

* fix(#3606): address review - segment-granular narrowing, zero-coverage diagnosis, quick.md, fragment extraction

* fix(#3606): drop stale shrink-ack, export HOOK_GROUP_KINDS, dedupe scanner regex

* chore(#3606): regenerate install-tree fixtures for new wave-post fragment

* chore(#3606): sync canonical launcher preamble into new fragment

* fix(#3606): keep fragment preamble ahead of first gsd_run mention

* fix(#3606): revert sync script's preamble move in explore.md

* chore(#3606): regenerate derived manifests post-rebase

* chore(#3606): allowlist peer test files - base was red on the count lane

* chore(#3606): regenerate inventory for peer's verify-command-grounding doc

* chore(#3606): grounding test maps to its own module by longest prefix

* chore(#3606): backfill changeset pr number

---------

Co-authored-by: sim <sim@local>

tests/fixtures/install-tree/augment.json

@@ -344,6 +344,7 @@
   "gsd-core/workflows/execute-phase/steps/post-merge-gate.md",
   "gsd-core/workflows/execute-phase/steps/regression-gate-run.md",
   "gsd-core/workflows/execute-phase/steps/regression-gate.md",
+  "gsd-core/workflows/execute-phase/steps/wave-post-gate-hooks.md",
   "gsd-core/workflows/execute-phase/steps/worktree-recovery-policy.md",
   "gsd-core/workflows/execute-plan.md",
   "gsd-core/workflows/explore.md",