Fix custom parser OpenAPI types and add structured default response schema

Agent-Logs-Url: https://github.com/fosrl/pangolin/sessions/73990123-9c27-444b-bc6e-77e890a0d57c

Co-authored-by: oschwartz10612 <4999704+oschwartz10612@users.noreply.github.com>

server/routers/siteResource/batchAddClientToSiteResources.ts

@@ -22,7 +22,7 @@ import {
 
 const batchAddClientToSiteResourcesParamsSchema = z
     .object({
-        clientId: z.string().transform(Number).pipe(z.number().int().positive())
+        clientId: z.coerce.number().int().positive()
     })
     .strict();