feat(core-B): 운영자 sync/verify CLI + cold-start onboarding (BAT-051, REQ-105/106, PR #32)

dcy-034 마지막 조각. sync(슬롯 qty←브로커+warning해제+OQ-A 전이엣지+FR-7 평단seed)/verify(C 재대조·강제해제없음). core-A QC minor 2건 정리 동봉. QC(opus) PASS, 683 passed.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VHtM5Ws1HKCKQ4JGi6GRb5

trex_core/domain/slot/state.py

@@ -69,9 +69,23 @@ _FROM_ERROR_TRANSITIONS: frozenset[tuple[SlotState, SlotState]] = frozenset(
     }
 )
 
+# dcy-034 / REQ-105 OQ-A: cold-start onboarding transition (actor=sync/reconcile only).
+# A permanent slot that already has a position in the broker at daemon cold-start can
+# transition INACTIVE→HOLDING so the sync command can onboard it without going through
+# the normal INACTIVE→PENDING_BUY buy-flow. Wire-contract unchanged: SlotState enum
+# values remain 5 (inactive/pending_buy/holding/pending_sell/error). Only the transition
+# table expands. Callers MUST supply actor="sync" and reason="onboarding" (or
+# "reconcile_sync") so the transition_log is auditable and distinct from the normal
+# strategy entry path (INACTIVE→PENDING_BUY→HOLDING).
+_SYNC_TRANSITIONS: frozenset[tuple[SlotState, SlotState]] = frozenset(
+    {
+        (SlotState.INACTIVE, SlotState.HOLDING),  # REQ-105 OQ-A: cold-start onboarding
+    }
+)
+
 
 ALLOWED_TRANSITIONS: frozenset[tuple[SlotState, SlotState]] = (
-    _BASE_TRANSITIONS | _TO_ERROR_TRANSITIONS | _FROM_ERROR_TRANSITIONS
+    _BASE_TRANSITIONS | _TO_ERROR_TRANSITIONS | _FROM_ERROR_TRANSITIONS | _SYNC_TRANSITIONS
 )