chore: remove dead guest-register event route

The /api/events/[id]/guest-register endpoint has no production
callers: it's superseded by tickets/purchase.post.js, which
handles guest Member upsert via status:"guest" when
body.createAccount is true. Drops the route file, its
source-assertion tests, guestRegisterSchema, and its validation
coverage.

server/api/events/[id]/guest-register.post.js

@@ -1,104 +0,0 @@
-import Event from '../../../models/event.js'
-import { connectDB } from '../../../utils/mongoose.js'
-import mongoose from 'mongoose'
-
-export default defineEventHandler(async (event) => {
-  try {
-    await connectDB()
-    const identifier = getRouterParam(event, 'id')
-    const body = await validateBody(event, guestRegisterSchema)
-
-    if (!identifier) {
-      throw createError({
-        statusCode: 400,
-        statusMessage: 'Event identifier is required'
-      })
-    }
-    
-    // Fetch the event
-    let eventData
-    if (mongoose.Types.ObjectId.isValid(identifier)) {
-      eventData = await Event.findById(identifier)
-    }
-    if (!eventData) {
-      eventData = await Event.findOne({ slug: identifier })
-    }
-    
-    if (!eventData) {
-      throw createError({
-        statusCode: 404,
-        statusMessage: 'Event not found'
-      })
-    }
-    
-    // Check if event allows public registration (not members-only)
-    if (eventData.membersOnly) {
-      throw createError({
-        statusCode: 403,
-        statusMessage: 'This event is for members only. Please become a member to register.'
-      })
-    }
-    
-    // If event requires payment, reject guest registration
-    if (eventData.pricing.paymentRequired && !eventData.pricing.isFree) {
-      throw createError({
-        statusCode: 402,
-        statusMessage: 'This event requires payment. Please use the payment registration endpoint.'
-      })
-    }
-    
-    // Check if event is full
-    if (eventData.maxAttendees && eventData.registrations.length >= eventData.maxAttendees) {
-      throw createError({
-        statusCode: 400,
-        statusMessage: 'Event is full'
-      })
-    }
-    
-    // Check if already registered
-    const alreadyRegistered = eventData.registrations.some(
-      reg => reg.email.toLowerCase() === body.email.toLowerCase()
-    )
-    
-    if (alreadyRegistered) {
-      throw createError({
-        statusCode: 400,
-        statusMessage: 'You are already registered for this event'
-      })
-    }
-    
-    // Add guest registration
-    eventData.registrations.push({
-      name: body.name,
-      email: body.email.toLowerCase(),
-      membershipLevel: 'guest',
-      isMember: false,
-      paymentStatus: 'not_required',
-      amountPaid: 0,
-      registeredAt: new Date()
-    })
-    
-    await eventData.save()
-    
-    // TODO: Send confirmation email for guest registration
-    
-    return {
-      success: true,
-      message: 'Successfully registered as guest',
-      registrationId: eventData.registrations[eventData.registrations.length - 1]._id,
-      note: 'As a guest, you have access to this free public event. Consider becoming a member for access to all events!'
-    }
-    
-  } catch (error) {
-    console.error('Error with guest registration:', error)
-    
-    if (error.statusCode) {
-      throw error
-    }
-    
-    throw createError({
-      statusCode: 500,
-      statusMessage: 'Failed to register as guest'
-    })
-  }
-})