When a region override is in effect, enable debug mode. Otherwise, Beryllium will reject it when it does the country mismatch check.

PiperOrigin-RevId: 526289564

quiche/blind_sign_auth/proto/public_metadata.proto

diff --git a/quiche/blind_sign_auth/proto/public_metadata.proto b/quiche/blind_sign_auth/proto/public_metadata.proto
index 5154200..1ba729d 100644
--- a/quiche/blind_sign_auth/proto/public_metadata.proto
+++ b/quiche/blind_sign_auth/proto/public_metadata.proto
@@ -42,6 +42,13 @@
 
   // When the token and metadata expire.
   quiche.protobuf.Timestamp expiration = 3;
+
+  // Indicates the debug context of this payload.
+  enum DebugMode {
+    UNSPECIFIED_DEBUG_MODE = 0;
+    DEBUG_ALL = 1;
+  }
+  DebugMode debug_mode = 4;
 }
 
 // Contains PublicMetadata and associated information. Only the public_metadata