feat(campaign): record unmatched file disposition

src/govoplan_campaign/backend/routes/versions.py

@@ -876,6 +876,9 @@ def build_version(
                 "write_eml": write_eml,
                 "built_count": result.get("built_count"),
                 "recovery_operation_id": recovery_start.operation_id,
+                "residual_file_disposition": _residual_file_audit_evidence(
+                    result.get("residual_file_disposition")
+                ),
             },
             commit=True,
         )
@@ -906,3 +909,19 @@ def build_version(
         raise HTTPException(
             status_code=status.HTTP_422_UNPROCESSABLE_CONTENT, detail=str(exc)
         ) from exc
+
+
+def _residual_file_audit_evidence(value: object) -> dict[str, object]:
+    if not isinstance(value, dict):
+        return {}
+    return {
+        key: value.get(key)
+        for key in (
+            "contract_version",
+            "action",
+            "routing_mode",
+            "validation_behavior",
+            "watched_source_count",
+            "residual_file_count",
+        )
+    }