fix(marketplace): correct stale hook references and migration guide errors

- claude-config-audit-settings.md: update hook inventory to post-Decision #29 state
- maintainer.md: remove PostToolUse references, update to current hook types
- settings-optimization.md: update review layer table and hooks.json format
- claude-config-optimize-settings.md: fix stale doc-guardian PostToolUse reference
- project-hygiene/claude-md-integration.md: rewrite for manual /hygiene check
- doc-guardian: update doc-sync.md and sync-workflow.md hook references
- MIGRATION-v9.md: mark deleted commands as Removed, not renamed
- projman/task-sizing.md: PostToolUse → PreToolUse in example
- scripts/setup.sh: /labels-sync → /labels sync
- docs/CONFIGURATION.md: doc-guardian "Commands and hooks" → "Commands only"
- docs/prompts/INDEX.md: add prompt execution index

Version: 9.0.1

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/MIGRATION-v9.md

@@ -21,10 +21,10 @@ v9.0.0 standardizes all commands to the `/<noun> <action>` sub-command pattern.
 | `/pm-review` | `/sprint review` | Moved under `/sprint` |
 | `/pm-test` | `/sprint test` | Moved under `/sprint` |
 | `/pm-setup` | `/projman setup` | Moved under `/projman` |
-| `/pm-debug` | `/projman debug` | Moved under `/projman` |
+| `/pm-debug` | **Removed** | Deleted in v8.1.0 — migrated to `debug-mcp` plugin (Decision #11) |
 | `/labels-sync` | `/labels sync` | |
-| `/suggest-version` | `/projman suggest-version` | Moved under `/projman` |
-| `/proposal-status` | `/projman proposal-status` | Moved under `/projman` |
+| `/suggest-version` | **Removed** | Deleted in v8.1.0 — migrated to `ops-release-manager` plugin (Decision #18) |
+| `/proposal-status` | **Removed** | Deleted in v8.1.0 — absorbed into `/project status` (Decision #19) |
 | `/rfc <sub>` | `/rfc <sub>` | Unchanged |
 | `/project <sub>` | `/project <sub>` | Unchanged |
 | `/adr <sub>` | `/adr <sub>` | Unchanged |