- Add USER_AWARENESS to the Verdict union in campaign-classifier.ts
- mapVerdictToActions('USER_AWARENESS') returns ['acknowledge_user']; not added to DESTRUCTIVE_ACTIONS so requires_approval computes false
- classifyCampaign's simulation branch now assigns verdict = 'USER_AWARENESS' directly instead of falling through to evaluateSpamVsUnwanted
- deriveDefaultParams('acknowledge_user') returns {} (no operator-editable params)
- Widen TriageNoteEvidence.verdict to admit 'USER_AWARENESS' (pure type widen, no formatting change)
- Tests: classifier simulation fixtures now assert USER_AWARENESS/acknowledge_user/requiresApproval=false; new mapVerdictToActions/computeRequiresApproval/deriveDefaultParams cases
- Pure switch over no_action/warn_user/block_sender/purge_message/
reset_password/isolate_endpoint/disable_forwarding_rule
- Unknown/future action types fall through to {} rather than throwing
