feat(storage): dual-write question/summary/interaction flows to events

The legacy task columns (question_json, summary, interactions_json) now
also emit events in the same transaction as the column update:

- UpdateTaskQuestion(non-empty) -> clarification_request (agent); the
  empty-string clear-on-answer emits nothing
- UpdateTaskSummary -> summary (agent)
- AppendTaskInteraction -> clarification_answer (user)

This populates the event stream from the existing Q&A and summary paths
without removing the old columns yet, setting up their eventual deletion
in the cleanup phase.

https://claude.ai/code/session_01SESwn7kQ7oP62trWw6pc39

0 files changed, 0 insertions, 0 deletions