WebhookEvent has no index on eventType, status, or receivedAt

[chonilius]

WebhookEvent (src/common/entities/webhook-event.entity.ts) has only deliveryId uniquely indexed (implicitly, via unique: true) — there is no @Index on eventType, status, or receivedAt, despite this being an append-only, ever-growing audit table by design (every inbound webhook, verified or not, gets a row per the entity's own doc comment: "Audit log of every inbound webhook ... for replay/debugging").

Any future operational tooling — an admin view listing recent FAILED events for triage, a metrics job counting events by type/day, or simply an engineer debugging "did webhook X for repo Y ever arrive" by filtering on eventType/receivedAt — will full-scan this table, which by its very nature never stops growing (nothing deletes old rows, unlike IdempotencyKey's TTL-based cleanup).

Fix: add a composite index on (eventType, status) and a separate index on receivedAt (or a composite covering common "recent failures" queries like (status, receivedAt)).

[stephanieoghenemega-eng]

@stephanieoghenemega-eng has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

hello maintainer, i would love to work on this

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