fixes

internal/issues/tracker.go

@@ -51,7 +51,10 @@ type Sample struct {
 	HTTPRoute  string `json:"httpRoute,omitempty"`
 	HTTPStatus int    `json:"httpStatus,omitempty"`
 	// Client/release context.
-	UserAgent   string `json:"userAgent,omitempty"`
+	UserAgent string `json:"userAgent,omitempty"`
+	// UAClass is derived from UserAgent when issues are served (see
+	// internal/uaclass); it is not part of the stored sample.
+	UAClass     string `json:"uaClass,omitempty"`
 	SourceIP    string `json:"sourceIp,omitempty"`
 	Release     string `json:"release,omitempty"`
 	Environment string `json:"environment,omitempty"`