[PR] Fix deferred TLS output handling on inbound close [pekko]

["He-Pin (via GitHub)" <gi...@apache.org>]

He-Pin opened a new pull request, #3324:
URL: https://github.com/apache/pekko/pull/3324

   ### Motivation
   `TlsGraphStage` migrated the TLS pump phases from `TlsActor` but also added deferred plaintext batching and deferred transport flushing. When transport input completes before either timer runs, the copied close transition can enter a non-executable `FlushingOutboundPhase` or complete before buffered ciphertext is emitted.
   
   ### Modification
   Flush buffered transport output before selecting the close phase, and use the `SSLEngine`'s `NEED_WRAP` state to decide whether protocol output still has to be generated. Add deterministic tests that hold zero-delay timers and cover pending plaintext, buffered ciphertext, and engine wrap output.
   
   ### Result
   Inbound close no longer strands the stage, already-wrapped ciphertext is delivered before completion, and pending engine output is wrapped before shutdown.
   
   ### Tests
   - `stream-tests / Test / testOnly org.apache.pekko.stream.io.TlsGraphStageDeferredCloseSpec` (3 passed)
   - `stream-tests / Test / testOnly org.apache.pekko.stream.io.TlsGraphStageIsolatedSpec` (7 passed)
   - `scalafmt --list --mode diff-ref=origin/main`
   - `headerCreateAll` and `+headerCheckAll`
   - `git diff --check`
   - Full test suite not run; focused validation only as requested.
   
   ### References
   Refs #2860
   


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Re: [PR] Fix deferred TLS output handling on inbound close [pekko]

["He-Pin (via GitHub)" <gi...@apache.org>]

He-Pin merged PR #3324:
URL: https://github.com/apache/pekko/pull/3324


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