* fix(agents): preserve final replies across compaction failures
* test(agents): normalize nullable pending final
* chore(deadcode): drop used outbound payload export baseline
* refactor(agents): clarify pending final compaction delivery guard
* fix(agents): preserve media in pending final recovery
* fix(agents): require persisted final marker before compaction
* fix: keep pending final marker result internal
* test: update plugin SDK surface budget
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Co-authored-by: Benjamin Badejo <ben@benbadejo.com>
Co-authored-by: Peter Steinberger <steipete@gmail.com>