feat: add GET /emails/metrics endpoint
Merged
DI
3mo ago+192+192+012345678901234567890123456789-0-0-0123456789
Adds the beta GET /emails/metrics endpoint: GetEmailsMetricsResponse/EmailMetricsDataRow schemas, period/domain/email/broadcast dimensions, and domain_id/email_id/broadcast_id filters (broadcast and email cannot be combined).
Mirrors the shipped public-api implementation (resend/resend-monorepo#8730 and its predecessors). Part of the emails/metrics rollout tracked in DEV-1771.
resend.json regenerates from this on merge to main.