feat: enforce import provenance exposure policy (#2)

Merge BAT-017 / REQ-021 implementation after delivery-runner implementation, independent QC, and passing GitHub Actions CI.

jarca_ledger_mcp/adapters/mcp/server.py

@@ -312,9 +312,21 @@ def import_toss_bank_pdf(file_path: str, account_id: str = "", skip_duplicates:
     return contracts.import_toss_bank_pdf(file_path, account_id, skip_duplicates)
 
 @mcp.tool()
-def list_ledger_import_batches(source: str = "", include_rolled_back: bool = True, limit: int = 50) -> dict:
+def list_ledger_import_batches(
+    source: str = "",
+    include_rolled_back: bool = True,
+    limit: int = 50,
+    provenance_exposure: str = "minimal",
+    debug_provenance_gate: bool = False,
+) -> dict:
     """List CSV/PDF/API import batches."""
-    return contracts.list_ledger_import_batches(source, include_rolled_back, limit)
+    return contracts.list_ledger_import_batches(
+        source,
+        include_rolled_back,
+        limit,
+        provenance_exposure=provenance_exposure,
+        debug_provenance_gate=debug_provenance_gate,
+    )
 
 @mcp.tool()
 def rollback_ledger_import_batch(import_batch_id: str, hard_delete: bool = False) -> dict: