chore(workspace): install all 4 bundled hooks + model default update

- Installed hooks: boot-md, session-memory, command-logger, bootstrap-extra-files
- Updated default model to litellm/copilot-claude-sonnet-4.6
- Added memory/startup-health.json + boot-last-run.json from boot check
- Added memory/startup-health.md warning log
- Captured new session memory files (2026-03-04/05)
- Minor MEMORY.md + USER.md: added git preference line

memory/startup-health.json

@@ -0,0 +1,22 @@
+{
+  "last_run_utc": "2026-03-05T04:28:00Z",
+  "status": "warn",
+  "checks_passed": [
+    "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",
+    "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)",
+    "update-status: no update available (current: 2026.3.2)"
+  ],
+  "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",
+  "last_backup_age_hours": 4.1,
+  "last_security_audit_age_hours": null,
+  "update_status": "up-to-date (2026.3.2 stable)"
+}