NetworkView: API routing fix, logout button, audit trail, port/notes editor tracking

- Fix frontend API base path (VITE_API_BASE env var, GraphPage hardcoded /api)
- Add logout button to NetworkView sidebar (clears portal SSO)
- Add AuditTrail component: inline change history on all entity pages
- DB migration: add updated_at, last_edited_by to ports table
- DB migration: add notes_last_edited_by, notes_updated_at to all entity tables
- Backend: track actor on port create/update; notes editor on entity PUT
- Frontend: extend types, MarkdownEditor shows last editor, port modal/list show last editor
- Fix port CREATE TABLE definition to include new columns upfront
- Add try/catch in handleSavePort to surface API errors in modal

IT_asset_management/app/routes/auth.py

@@ -15,4 +15,4 @@ def login():
 @login_required
 def logout():
     logout_user()
-    return redirect(current_app.config.get('PORTAL_LOGIN_URL', 'http://localhost:8080/login'))
+    return redirect(current_app.config.get('PORTAL_LOGOUT_URL', 'http://localhost:8080/logout'))