Chore: Propagate context for plugin settings (#41166)

Ref #36734

pkg/api/pluginproxy/pluginproxy.go

@@ -25,7 +25,7 @@ func NewApiPluginProxy(ctx *models.ReqContext, proxyPath string, route *plugins.
 	appID string, cfg *setting.Cfg, encryptionService encryption.Service) *httputil.ReverseProxy {
 	director := func(req *http.Request) {
 		query := models.GetPluginSettingByIdQuery{OrgId: ctx.OrgId, PluginId: appID}
-		if err := bus.Dispatch(&query); err != nil {
+		if err := bus.DispatchCtx(ctx.Req.Context(), &query); err != nil {
 			ctx.JsonApiErr(500, "Failed to fetch plugin settings", err)
 			return
 		}

pkg/api/pluginproxy/pluginproxy_test.go

@@ -164,7 +164,7 @@ func TestPluginProxy(t *testing.T) {
 			Method: "GET",
 		}
 
-		bus.AddHandler("test", func(query *models.GetPluginSettingByIdQuery) error {
+		bus.AddHandlerCtx("test", func(_ context.Context, query *models.GetPluginSettingByIdQuery) error {
 			query.Result = &models.PluginSetting{}
 			return nil
 		})