Adds the two service primitives Phase 11's manage handler needs.
- event.Service.CountActiveDedup(ctx, tokenID): Redis SCAN over
dedup:trigger:{tokenID}:* in batches of 100, sums (value-1) for each
key (value=1 = first trigger fired notification, value=N>1 = N-1
silenced). Returns 0 when no rdb is configured.
- token.Service.DeleteByManageID: thin wrapper around
Repository.DeleteByManageID; ServiceRepository interface gains the
method so test fakes can implement it (fakeRepo updated). Returns
ErrNotFound on no-rows.
Tests cover: empty pattern returns 0, first-trigger-only returns 0
(notify fired, nothing silenced), aggregation across IPs sums correctly,
other tokens' keys are excluded by the prefix match, nil rdb returns 0.
e3f9ff48f9