feat(github_hooks): add zebra migrations

Author: loadez

github_hooks/db/migrate/20251118091829_add_expires_at_to_jobs.rb

@@ -0,0 +1,5 @@
+class AddExpiresAtToJobs < ActiveRecord::Migration[6.1]
+  def change
+    add_column :jobs, :expires_at, :datetime
+  end
+end

github_hooks/db/migrate/20251119103829_add_expires_created_index_at_jobs_table.rb

@@ -0,0 +1,11 @@
+class AddExpiresCreatedIndexAtJobsTable < ActiveRecord::Migration[6.1]
+  disable_ddl_transaction!
+
+  def change
+    add_index :jobs,
+              %i[expires_at created_at],
+              name: "index_jobs_on_expires_created_not_null",
+              algorithm: :concurrently,
+              where: "expires_at IS NOT NULL"
+  end
+end

github_hooks/db/migrate/20251119104017_add_organization_created_index_at_jobs_table.rb

@@ -0,0 +1,11 @@
+class AddOrganizationCreatedIndexAtJobsTable < ActiveRecord::Migration[6.1]
+  disable_ddl_transaction!
+
+  def change
+    add_index :jobs,
+              %i[organization_id created_at],
+              name: "index_jobs_on_organization_created_expires_is_null",
+              algorithm: :concurrently,
+              where: "expires_at IS NULL"
+  end
+end