test(parity): port consumer pull queue & filter tests (T14) + DB update
Port 48 Go parity tests from TestJetStreamConsumerPull* and related
functions in jetstream_consumer_test.go to unit-level .NET tests.
Enhancements to PullConsumerEngine:
- MaxBytes enforcement in FetchAsync loop (stops delivery when budget exceeded)
- PullRequestWaitQueue with priority-ordered stable enqueue and popAndRequeue
round-robin semantics within same-priority groups
- PullWaitingRequest record with Priority, RemainingBatch, Reply fields
Enhancements to ConsumerConfig:
- MaxWaiting, MaxRequestBatch, MaxRequestMaxBytes, MaxRequestExpiresMs
New tests (51 total in ConsumerPullQueueTests.cs):
- Pull MaxAckPending enforcement, FIFO delivery, one-shot semantics
- Pull timeout (ExpiresMs), NoWait behavior, MaxBytes byte budget
- Three-filter and multi-filter subject filtering, filter update
- WaitQueue priority ordering and popAndRequeue round-robin
- Pending count tracking, ack floor advancement, redelivery
- DeliverPolicy Last/LastPerSubject/ByStartTime with filters
- ConsumerIsFiltered detection, overlapping subject filters
DB: 37 Go tests mapped → ConsumerPullQueueTests.cs (1,386 total mapped)
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