Materialize ballot question testimony counters

[tripledoublev]

Summary

• store ballot-question testimony counters on ballot question docs and use them in SSR instead of scanning publishedTestimony
• route testimony publish/delete count updates by scope: regular testimony updates bill counters; ballot-question testimony updates ballot-question counters
• preserve runtime-managed counters during YAML sync and add a backfill script for existing ballot-question testimony summaries
• align ballot-question status typing/rendering with the YAML lifecycle values currently in the repo

Verification

• yarn check-formatting
• yarn check-types

Notes

• Attempted affected integration tests, but the local Firebase emulator/auth service was unavailable in this shell (auth/network-request-failed and Firestore hook timeouts), so those could not complete locally (integration tests passed in CI)