revert(database-tools): restore mongo username+password paired validation

Author: waleedlatif1

apps/sim/lib/api/contracts/database-tools.ts

@@ -120,15 +120,20 @@ export const rdsIntrospectBodySchema = rdsConnectionBodySchema.extend({
   engine: z.enum(['aurora-postgresql', 'aurora-mysql']).optional(),
 })
 
-const mongoConnectionBodySchema = z.object({
-  host: z.string().min(1, 'Host is required'),
-  port: z.coerce.number().int().positive('Port must be a positive integer'),
-  database: z.string().min(1, 'Database name is required'),
-  username: z.string().min(1, 'Username is required').optional(),
-  password: z.string().min(1, 'Password is required').optional(),
-  authSource: z.string().optional(),
-  ssl: sslModeSchema,
-})
+const mongoConnectionBodySchema = z
+  .object({
+    host: z.string().min(1, 'Host is required'),
+    port: z.coerce.number().int().positive('Port must be a positive integer'),
+    database: z.string().min(1, 'Database name is required'),
+    username: z.string().min(1, 'Username is required').optional(),
+    password: z.string().min(1, 'Password is required').optional(),
+    authSource: z.string().optional(),
+    ssl: sslModeSchema,
+  })
+  .refine((data) => Boolean(data.username) === Boolean(data.password), {
+    message: 'Username and password must be provided together',
+    path: ['password'],
+  })
 
 const mongoJsonStringOrObjectSchema = (message: string) =>
   z