Add 14 tests covering key routing and dispatch flows that previously had
zero direct coverage:
dispatchResultText:
- bare text produces no outbound (scratchpad only)
- unknown destination dropped, valid destination sent
- multiple <message> blocks each produce correct outbound
- internal tags stripped from scratchpad
originAttr / from= metadata:
- chat/task/webhook/system messages include from= when destination matches
- fallback to raw unknown:channel:platform when no match
- from= omitted when routing is null
resolveDestinationThread:
- null thread_id when no prior inbound from destination
- most recent thread_id wins with multiple inbound messages
Also fix merge issue: restore getAllDestinations import removed by our PR
but still needed by #2327's compaction reminder. Fix stale destinations
test assertion from #2328 ("no special wrapping needed" → "Every response
must be wrapped").
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
3af6e70c05