fix: preserve active turn for late ZCode permissions

[vitry]

Summary

• observe legacy ZCode completion without consuming the active turn
• keep later 0.16.5 permission requests valid until authoritative v4/snapshot terminal state
• release local turn state on every executor teardown path while preserving durable terminal winners
• refresh the checked-in marketplace runtime snapshot

Root cause

ZCode 0.16.5 can emit prompt_completed at admission time and request tool permission later. executeJob used the destructive waitForCompletion() API for that wake, which cleared the active turn before interaction/requestPermission arrived.

Test plan

• focused permission/completion contracts: 41/41
• npm run check
• main suite: 2571 passed, 0 failed, 3 opt-in skipped
• marketplace integration: 2/2
• qualification suite: 56 passed, 0 failed, 3 opt-in skipped
• final Standards and Spec subagent reviews

Scope

No changes to decidePermission, permission risk policy, appserver flags, broker wire/auth contracts, or persisted schemas.