BOLT-1264: scope poll-failure streak to distinct ticks, not BullMQ retries

Cursor flagged two related bugs in the G2 streak alert: (1) BullMQ attempts:3 retries incremented streak up to 3 times per tick; (2) Polled reset ran before ingest/ack so an ack-only outage never crossed threshold. Fix gates the increment on isFinalAttempt and defers the reset to end of tick. Three new regression tests. PR #12249. Branch artem-agent/bolt-1264-streak-counter-fixes. Full suite 498 passing.