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/adapters/portfolio/hub_read.py

@@ -1,4 +1,4 @@
-"""portfolio-hub read HTTP adapter (REQ-027 AC-1/AC-4).
+"""portfolio-hub read HTTP adapter (REQ-027 AC-1/AC-4; REQ-105 FR-7 cost-basis).
 
 Matches the live portfolio-hub HTTP contract:
   GET /v1/user_info   -> UserInfoResponse {"daemon_id": "...", ...}
@@ -119,3 +119,29 @@ class PortfolioHubReadAdapter:
                 strategy_params=dict(raw.get("strategy_params") or {}),
             ))
         return out
+
+    def get_cost_basis(self, portfolio_id: str) -> "Optional[float]":
+        """REQ-105 FR-7: GET /v1/portfolios/{id}/holdings/cost-basis -> avg_cost (WAC).
+
+        Returns None on any error (graceful degrade — caller logs WARN and skips
+        avg_price seed). portfolio-hub REQ-043 must be live for this to succeed.
+        """
+        url = f"{self._base_url}/v1/portfolios/{portfolio_id}/holdings/cost-basis"
+        try:
+            resp = self._get(url)
+        except Exception:  # noqa: BLE001 — network/timeout — degrade
+            return None
+        if not (200 <= resp.status_code < 300):
+            return None
+        try:
+            body = resp.json()
+        except ValueError:
+            return None
+        if isinstance(body, dict):
+            val = body.get("avg_cost") or body.get("wac") or body.get("cost_basis")
+            if val is not None:
+                try:
+                    return float(val)
+                except (TypeError, ValueError):
+                    return None
+        return None

trex_core/adapters/portfolio/reconcile_warning_store.py

@@ -67,3 +67,22 @@ class PostgreSQLReconcileWarningStore:
             with conn.cursor() as cur:
                 cur.execute("SELECT slot_id FROM slot_reconcile_warning")
                 return {row[0] for row in cur.fetchall()}
+
+    def get_warning_info(self, slot_id: str) -> dict | None:
+        """Return {"portfolio_id", "case_code", "actor", "reason"} or None (REQ-105/106)."""
+        with self._psycopg.connect(self._dsn) as conn:
+            with conn.cursor() as cur:
+                cur.execute(
+                    "SELECT portfolio_id, case_code, actor, reason "
+                    "FROM slot_reconcile_warning WHERE slot_id = %s LIMIT 1",
+                    (slot_id,),
+                )
+                row = cur.fetchone()
+                if row is None:
+                    return None
+                return {
+                    "portfolio_id": row[0],
+                    "case_code": row[1],
+                    "actor": row[2],
+                    "reason": row[3],
+                }