Keep Hermes interim status updates inside the active turn

[shiftedx]

Summary

• recognize Hermes _interim_send lifecycle metadata in the attach adapter
• render interim status and tool-error notices into the mutable CozyChat draft
• reserve done and active-turn cleanup for the real final response
• add a regression proving interim notices preserve the active turn

Root cause

Hermes emits marked status and error notices through the ordinary platform send surface. CozyGateway ignored the lifecycle marker, treated the first notice as terminal, sent done, and deleted the turn anchor. Later tool updates and the final response were then rejected as no in-flight turn.

Validation

• focused red/green interim lifecycle regression
• attach-plugin suite: 98 passed
• live Night Owl trace reproduced the lost anchor after an interim tool-error path
• git diff --check passed