Fix deploy workflow functions tests

[denuoweb]

Summary

• make DPoP URL test assertions tolerate the deploy workflow project id
• isolate device token verification tests from deploy-time DEVICE_TOKEN_PRIVATE_KEY secrets

Verification

• FIREBASE_PROJECT_ID=crowdpmplatform GCLOUD_PROJECT=crowdpmplatform GCP_PROJECT=crowdpmplatform DEVICE_TOKEN_PRIVATE_KEY=not-a-valid-key nvm exec 24.15.0 pnpm --filter crowdpm-functions test -- test/routes/pairing.test.ts test/services/ingestGateway.test.ts test/services/deviceTokensVerification.test.ts
• nvm exec 24.15.0 pnpm --filter crowdpm-functions test
• nvm exec 24.15.0 pnpm --filter crowdpm-functions build