Added source and user marks to opportunities type. Any ignored errors are deferred to //nolint with a comment instead of being silently dropped

internal/mock/findATender/ratelimit.go

@@ -114,7 +114,7 @@ func (rl *RateLimiter) Middleware(next http.HandlerFunc) http.HandlerFunc {
 			w.Header().Set("Retry-After", strconv.Itoa(retry))
 			w.Header().Set("Content-Type", "text/plain; charset=utf-8")
 			w.WriteHeader(http.StatusTooManyRequests)
-			_, _ = fmt.Fprintf(
+			fmt.Fprintf( //nolint:errcheck // the client may have gone; nothing to do
 				w, "Rate limit of %d exceeded. Please retry after %d seconds.",
 				rl.limit, retry,
 			)