Fix pipe event accounting and aligned tablet failure reporting

[Caideyipi]

Description

This PR contains two independent fixes.

Pipe:

• UnboundedBlockingPendingQueue#pollLast() now updates event-count accounting when it removes the tail event, consistent with the other poll paths.
• Replaced pipe progress-report events are released when PipeRealtimeDataRegionSource swaps them out, avoiding leaked references/accounting.

Write:

• TsFileProcessor.insertTablet() no longer overwrites existing per-row failure statuses with SUCCESS_STATUS after aligned tablet insertion.
• Aligned tablet memory scheduling counts all rows appended to AlignedTVList, because failed rows are still appended and masked by bitmap rather than skipped. This avoids underestimating TVList array memory.

Tests

• mvn spotless:apply -pl iotdb-core/node-commons
• mvn -pl iotdb-core/node-commons -Dtest=UnboundedBlockingPendingQueueTest test
• mvn spotless:apply -pl iotdb-core/datanode
• git diff --check
• mvn test -pl iotdb-core/datanode -Dtest=TsFileProcessorTest#alignedTabletKeepsFailedStatusesAndCountsWrittenRows (blocked by existing generated-sources/freemarker compile errors unrelated to this change)