feat: Checkly app connection and secrets sync (#4078)

* feat: checkly app connection
---------
Co-authored-by: greptile-apps[bot] <165735046+greptile-apps[bot]@users.noreply.github.com>

backend/src/server/routes/v1/app-connection-routers/app-connection-router.ts

@@ -39,6 +39,10 @@ import {
   CamundaConnectionListItemSchema,
   SanitizedCamundaConnectionSchema
 } from "@app/services/app-connection/camunda";
+import {
+  ChecklyConnectionListItemSchema,
+  SanitizedChecklyConnectionSchema
+} from "@app/services/app-connection/checkly";
 import {
   CloudflareConnectionListItemSchema,
   SanitizedCloudflareConnectionSchema
@@ -128,7 +132,8 @@ const SanitizedAppConnectionSchema = z.union([
   ...SanitizedCloudflareConnectionSchema.options,
   ...SanitizedBitbucketConnectionSchema.options,
   ...SanitizedZabbixConnectionSchema.options,
-  ...SanitizedRailwayConnectionSchema.options
+  ...SanitizedRailwayConnectionSchema.options,
+  ...SanitizedChecklyConnectionSchema.options
 ]);
 
 const AppConnectionOptionsSchema = z.discriminatedUnion("app", [
@@ -163,7 +168,8 @@ const AppConnectionOptionsSchema = z.discriminatedUnion("app", [
   CloudflareConnectionListItemSchema,
   BitbucketConnectionListItemSchema,
   ZabbixConnectionListItemSchema,
-  RailwayConnectionListItemSchema
+  RailwayConnectionListItemSchema,
+  ChecklyConnectionListItemSchema
 ]);
 
 export const registerAppConnectionRouter = async (server: FastifyZodProvider) => {