fix: the search test reads the last pass as JSON, since jsonb respaces it (M502 #5521)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/wanted/search_test.go

@@ -117,8 +117,9 @@ func TestSearcher_FindsAndTakesAWant_Integration(t *testing.T) {
 		t.Errorf("grab = %+v", g)
 	}
 	settings, _ := q.GetAcquisitionSettings(ctx)
-	if !settings.LastPassAt.Valid || !strings.Contains(string(settings.LastPass), `"grabbed":1`) {
-		t.Errorf("last pass = %s", settings.LastPass)
+	var last Report
+	if err := json.Unmarshal(settings.LastPass, &last); err != nil || !settings.LastPassAt.Valid || last.Grabbed != 1 {
+		t.Errorf("last pass = %s (%v)", settings.LastPass, err)
 	}
 
 	// A want with a download running is not searched again.