feat(bsr): add summary unavailable error

internal/bsr/errors.go

@@ -19,3 +19,6 @@ var ErrNotSupported = errors.New("not supported by protocol")
 
 // ErrBsrKeyPersistenceFailure indicates a failure in persisting BSR encryption keys
 var ErrBsrKeyPersistenceFailure = errors.New("could not persist BSR keys")
+
+// ErrSummaryUnavailable indicates a BSR summary is unavailable
+var ErrSummaryUnavailable = errors.New("summary not available")

internal/bsr/types.go

@@ -13,6 +13,7 @@ type (
 		ConnectionCount uint64
 		StartTime       time.Time
 		EndTime         time.Time
+		Errors          error
 	}
 
 	// ConnectionSummary encapsulates data for a connection, including its connection id, channel count,