Fix shares_collectionId_fkey constraint error with CASCADE delete (#10196)

* Fix foreign key constraint error for shares.collectionId

- Add migration to update shares_collectionId_fkey constraint with CASCADE delete
- This fixes the constraint violation when deleting collections that have associated shares
- Follows the same pattern as the existing shares_documentId_fkey cascade fix

Fixes #10185

* Simplify migration by removing unnecessary loop and constraint array

- Remove loop and constraintNames array since there's only one constraint
- Directly reference 'shares_collectionId_fkey' constraint name
- Keep the same functionality but with cleaner, simpler code

---------

Co-authored-by: codegen-sh[bot] <131295404+codegen-sh[bot]@users.noreply.github.com>

server/migrations/20250917124000-fix-shares-collection-cascade.js

@@ -0,0 +1,36 @@
+"use strict";
+
+/** @type {import('sequelize-cli').Migration} */
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    // Drop the existing foreign key constraint
+    await queryInterface.sequelize.query(
+      `ALTER TABLE "shares" DROP CONSTRAINT "shares_collectionId_fkey"`
+    );
+
+    // Add the foreign key constraint with CASCADE delete
+    await queryInterface.sequelize.query(`
+      ALTER TABLE "shares"
+      ADD CONSTRAINT "shares_collectionId_fkey" 
+      FOREIGN KEY("collectionId") 
+      REFERENCES "collections" ("id")
+      ON DELETE CASCADE
+    `);
+  },
+
+  async down(queryInterface, Sequelize) {
+    // Drop the cascade constraint
+    await queryInterface.sequelize.query(
+      `ALTER TABLE "shares" DROP CONSTRAINT "shares_collectionId_fkey"`
+    );
+
+    // Add back the original constraint without cascade
+    await queryInterface.sequelize.query(`
+      ALTER TABLE "shares"
+      ADD CONSTRAINT "shares_collectionId_fkey" 
+      FOREIGN KEY("collectionId") 
+      REFERENCES "collections" ("id")
+      ON DELETE NO ACTION
+    `);
+  },
+};