ops(triage): event_kind_hint diagnostic logging cleanup (PR-4B Apply 영구 보류)

chore-memo-NULL-backfill 6/6 H1 (historical artifact) 확정 후 Apply PR 영구 보류.
406b810 의 8-line logger.info 블록 제거 (behavior 변경 0, 진단 데이터 더 이상 불필요).

backup: app/workers/classify_worker.py.pre-eventkind-cleanup (7일 안전망 ~2026-05-25)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/workers/classify_worker.py

@@ -687,14 +687,6 @@ async def _apply_triage_result(
         # 허용 enum 외 값이면 무시 (DB enum 제약). AI worker 는 events row 직접 생성 X.
         valid_kinds = {"note", "task", "calendar_event", "activity_log", "reference"}
         hint = (triage_out.event_kind_hint or "").strip().lower() or None
-        logger.info(
-            "[triage] event_kind_hint id=%s raw=%r normalized=%r in_valid=%s confidence=%r",
-            document_id,
-            triage_out.event_kind_hint,
-            hint,
-            hint in valid_kinds,
-            triage_out.event_kind_confidence,
-        )
         if hint in valid_kinds:
             doc.ai_event_kind = hint
             try: