chore(memory): clear stale hooks warning from startup health

memory/startup-health.json

@@ -5,6 +5,7 @@
     "core-workspace-files: AGENTS.md, SOUL.md, USER.md, TOOLS.md, HEARTBEAT.md",
     "skill-folders: all 7 required skills present",
     "tasks-state: memory/tasks.json exists",
+    "hooks: 5/5 ready (boot-md, bootstrap-extra-files, command-logger, model-skill-injector, session-memory)",
     "permissions: ~/.openclaw is 700; all credentials are 600",
     "network-exposure: gateway local-only (127.0.0.1 / ::1 only)",
     "backup-freshness: last backup ~4.1h ago (within 8h threshold)",
@@ -12,7 +13,6 @@
   ],
   "checks_failed": [],
   "warnings": [
-    "hooks: 0 hooks installed — session-memory, command-logger, bootstrap-extra-files, boot-md all missing/not installed",
     "security-audit: no recent openclaw security audit --deep result found (stale/missing)"
   ],
   "gateway_exposure": "local-only",