Task 5 (aeb14cf) correctly added scene/person-based automatic routing,
but also introduced tag/combined-target features and changed doSendAttempt
conversationId handling that were not in the task brief.
This commit reverts those out-of-scope changes while keeping the
scene/person routing and account-type selection that belong to Task 5:
- Revert tag target resolution to single-tag logic (no tag_ids/inner_logic)
- Remove combined target type and all helper methods
- Revert doSendAttempt conversationId to use record.conversationId directly
- Keep conversation_scene routing, person_type routing, and account-type helpers
jinliang
3a8d51b0df