Add Zod validation to all API endpoints and remove debug test route

Adds schema-based input validation across helcim, events, members,
series, admin, and updates API endpoints. Removes the peer-support
debug test endpoint. Adds validation test coverage.

server/api/admin/series.post.js

@@ -7,15 +7,7 @@ export default defineEventHandler(async (event) => {
     const admin = await requireAdmin(event)
     await connectDB()
 
-    const body = await readBody(event)
-
-    // Validate required fields
-    if (!body.id || !body.title || !body.description) {
-      throw createError({
-        statusCode: 400,
-        statusMessage: 'Series ID, title, and description are required'
-      })
-    }
+    const body = await validateBody(event, adminSeriesCreateSchema)
 
     // Create new series
     const newSeries = new Series({
@@ -43,9 +35,10 @@ export default defineEventHandler(async (event) => {
       })
     }
     
+    if (error.statusCode) throw error
     throw createError({
       statusCode: 500,
-      statusMessage: error.message || 'Failed to create series'
+      statusMessage: 'An unexpected error occurred'
     })
   }
 })