chore(deps): update @google-cloud/firestore to ^8.0.0 to resolve @tootallnate/once vulnerability

Replace internal import of DEFAULT_DATABASE_ID from @google-cloud/firestore/build/src/path
with a local constant, as v8 no longer ships .d.ts for that internal module.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

Author: ouzkilic

package-lock.json

@@ -218,7 +218,7 @@
     "uuid": "^11.0.2"
   },
   "optionalDependencies": {
-    "@google-cloud/firestore": "^7.11.0",
+    "@google-cloud/firestore": "^8.0.0",
     "@google-cloud/storage": "^7.19.0"
   },
   "devDependencies": {

package.json

@@ -24,7 +24,7 @@ import { Firestore } from '@google-cloud/firestore';
 import { App, getApp } from '../app';
 import { FirebaseApp } from '../app/firebase-app';
 import { FirestoreService, FirestoreSettings } from './firestore-internal';
-import { DEFAULT_DATABASE_ID } from '@google-cloud/firestore/build/src/path';
+const DEFAULT_DATABASE_ID = '(default)';
 
 export {
   AddPrefixToKeys,

src/firestore/index.ts

@@ -28,7 +28,7 @@ import {
 } from '../../../src/app/credential-internal';
 import { FirestoreService, getFirestoreOptions } from '../../../src/firestore/firestore-internal';
 import { getSdkVersion } from '../../../src/utils/index';
-import { DEFAULT_DATABASE_ID } from '@google-cloud/firestore/build/src/path';
+const DEFAULT_DATABASE_ID = '(default)';
 
 describe('Firestore', () => {
   let mockApp: FirebaseApp;

test/unit/firestore/firestore.spec.ts

@@ -24,7 +24,7 @@ import * as chaiAsPromised from 'chai-as-promised';
 import * as mocks from '../../resources/mocks';
 import { App } from '../../../src/app/index';
 import { getFirestore, initializeFirestore, Firestore } from '../../../src/firestore/index';
-import { DEFAULT_DATABASE_ID } from '@google-cloud/firestore/build/src/path';
+const DEFAULT_DATABASE_ID = '(default)';
 
 chai.should();
 chai.use(sinonChai);