fix: address account valuation review findings

jarca_ledger_mcp/application/cross_transfer_service.py

@@ -17,6 +17,8 @@ from .shared import (
     now_iso,
     ok,
     re,
+    read_db,
+    read_operation,
     row_to_dict,
 )
 from .review_decision_service import attach_review_decisions
@@ -457,7 +459,8 @@ def _run_cross_account_transfer_match(limit: int = 500, dry_run: bool = True, db
     review_items: list[dict[str, Any]] = []
     matched_tx_ids: set[str] = set()
 
-    with db(db_path) as conn:
+    connection_context = db if not dry_run else read_db
+    with connection_context(db_path) as conn:
         kb_rows = _fetch_transfer_candidates(conn, "kb_bank_pdf")
         toss_rows = _fetch_transfer_candidates(conn, "toss_bank_pdf")
         toss_index = _build_cross_transfer_index(toss_rows)
@@ -591,6 +594,7 @@ def _run_cross_account_transfer_match(limit: int = 500, dry_run: bool = True, db
     )
 
 
+@read_operation
 def preview_cross_account_transfers(limit: int = 500, db_path: str | None = None) -> dict[str, Any]:
     return _run_cross_account_transfer_match(limit=limit, dry_run=True, db_path=db_path)
 
@@ -599,11 +603,12 @@ def run_cross_account_transfer_match(limit: int = 500, db_path: str | None = Non
     return _run_cross_account_transfer_match(limit=limit, dry_run=False, db_path=db_path)
 
 
+@read_operation
 def list_cross_transfer_review_queue(limit: int = 300, db_path: str | None = None) -> dict[str, Any]:
     clauses = ["t.status='active'", "t.source IN ('kb_bank_pdf','toss_bank_pdf')"]
     clauses.append("t.memo LIKE '%cross_transfer_review:%'")
     where = " WHERE " + " AND ".join(clauses)
-    with db(db_path) as conn:
+    with read_db(db_path) as conn:
         rows = conn.execute(
             f"SELECT * FROM transactions t{where} ORDER BY t.transaction_date DESC, t.created_at DESC LIMIT ?",
             (max(1, min(int(limit), 1000)),),