fix: restore snapshot admin CI validation

src/quant_engine/snapshot_admin_store_v1.py

@@ -908,6 +908,8 @@ def validate_account_snapshot_rows(rows: list[dict[str, Any]]) -> list[str]:
             errors.append(f"account_snapshot row {idx}: invalid account_type {account_type!r}")
         if not ticker and name != "예수금/D+2현금":
             errors.append(f"account_snapshot row {idx}: ticker required")
+        if ticker and not re.fullmatch(r"(?:\d{6}|[A-Z0-9]{6}|[A-Z]{1,5})", ticker):
+            errors.append(f"account_snapshot row {idx}: ticker must be 6 digits or an uppercase symbol")
         if not name:
             errors.append(f"account_snapshot row {idx}: name required")
         if parse_status not in ALLOWED_PARSE_STATUS:
@@ -936,7 +938,7 @@ def validate_account_snapshot_rows(rows: list[dict[str, Any]]) -> list[str]:
             errors.append(f"account_snapshot row {idx}: CAPTURE_READ_OK rows require user_confirmed=Y")
         if entry_stage and canonical.get("entry_stage", {}).get("allowed") and entry_stage not in canonical["entry_stage"]["allowed"]:
             errors.append(f"account_snapshot row {idx}: invalid entry_stage {entry_stage!r}")
-        if position_type and canonical.get("position_type", {}).get("allowed") and position_type not in canonical["position_type"]["allowed"]:
+        if position_type and name != "예수금/D+2현금" and canonical.get("position_type", {}).get("allowed") and position_type not in canonical["position_type"]["allowed"]:
             errors.append(f"account_snapshot row {idx}: invalid position_type {position_type!r}")
     return errors