fix: skip database connection during build when MONGO_URL is not set

Add check for MONGO_URL existence before attempting database connection
in hooks.server.ts. This prevents build failures in CI environments where
no .env file is present, while still initializing the connection properly
at runtime on the server.

src/hooks.server.ts

@@ -7,20 +7,25 @@ import { sequence } from "@sveltejs/kit/hooks"
 import * as auth from "./auth"
 import { initializeScheduler } from "./lib/server/scheduler"
 import { dbConnect } from "./utils/db"
+import { env } from "$env/dynamic/private"
 import fs from 'fs'
 import path from 'path'
 
-// Initialize database connection on server startup
-console.log('🚀 Server starting - initializing database connection...');
-await dbConnect().then(() => {
-  console.log('✅ Database connected successfully');
-  // Initialize the recurring payment scheduler after DB is ready
-  initializeScheduler();
-  console.log('✅ Recurring payment scheduler initialized');
-}).catch((error) => {
-  console.error('❌ Failed to connect to database on startup:', error);
-  // Don't crash the server - API routes will attempt reconnection
-});
+// Initialize database connection on server startup (skip during build when no env vars)
+if (env.MONGO_URL) {
+  console.log('🚀 Server starting - initializing database connection...');
+  await dbConnect().then(() => {
+    console.log('✅ Database connected successfully');
+    // Initialize the recurring payment scheduler after DB is ready
+    initializeScheduler();
+    console.log('✅ Recurring payment scheduler initialized');
+  }).catch((error) => {
+    console.error('❌ Failed to connect to database on startup:', error);
+    // Don't crash the server - API routes will attempt reconnection
+  });
+} else {
+  console.log('⚠️  MONGO_URL not set - skipping database initialization (build mode)');
+}
 
 async function authorization({ event, resolve }) {
 	const session = await event.locals.auth();