fix: resolve zValidator type issues with optional schemas

Co-Authored-By: Dallin Bentley <dallinbentley98@gmail.com>

apps/server/src/api/v2/slack/index.ts

@@ -19,7 +19,7 @@ import { updateIntegrationHandler } from './update-integration';
 
 const app = new Hono()
   // Public endpoints (no auth required for OAuth flow)
-  .post('/auth/init', requireAuth, zValidator('json', InitiateOAuthSchema), initiateOAuthHandler)
+  .post('/auth/init', requireAuth, zValidator('json', z.object({}).merge(InitiateOAuthSchema.unwrap())), initiateOAuthHandler)
   .get('/auth/callback', handleOAuthCallbackHandler)
   // Protected endpoints
   .get('/integration', requireAuth, getIntegrationHandler)

apps/server/src/api/v2/slack/initiate-oauth.ts

@@ -1,6 +1,5 @@
 import { getUserOrganizationId } from '@buster/database';
 import {
-  type InitiateOAuthRequest,
   type InitiateOAuthResponse,
   InitiateOAuthResponseSchema,
   SlackError,

apps/server/src/api/v2/slack/update-integration.ts

@@ -1,7 +1,6 @@
 import { getUserOrganizationId } from '@buster/database';
 import {
   SlackError,
-  type UpdateIntegrationRequest,
   type UpdateIntegrationResponse,
   UpdateIntegrationResponseSchema,
 } from '@buster/server-shared/slack';