Groundwork for the v1→v2 Cloud Functions migration; no function is migrated yet
(all 35 still load as v1, verified via emulator discovery).
- options.ts: setGlobalOptions({ region: 'us-central1', maxInstances: 20 }), imported
first in index.ts so it applies before any v2 function is defined. Region pin is
load-bearing — the Android client uses the default region.
- notifications/push.ts: single canonical getUserTokens() + sendPushToUser() that
batches via messaging.sendEachForMulticast() and prunes dead tokens, to replace the
~10 copied token readers and ~19 copied send/prune blocks in later batches.
- log.ts: firebase-functions/logger re-export + redactToken() (FCM tokens are secrets).
- push.test.ts: 9 unit tests (token merge/dedupe, BatchResponse→dead-token mapping,
send/prune/no-op/whole-batch-failure paths). 67 tests green.
firebase-functions stays at v5.1.1 for the migration (supports both the root v1 API and
the /v2 subpaths); bump to v6 is deferred to the final batch once nothing references the
root namespace, so the build stays green at every step.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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