Add pkce

db/migrate/20251108090123_add_pkce_support_to_oidc_authorization_codes.rb

@@ -0,0 +1,9 @@
+class AddPkceSupportToOidcAuthorizationCodes < ActiveRecord::Migration[8.1]
+  def change
+    add_column :oidc_authorization_codes, :code_challenge, :string
+    add_column :oidc_authorization_codes, :code_challenge_method, :string
+
+    # Add index for code_challenge to improve query performance
+    add_index :oidc_authorization_codes, :code_challenge
+  end
+end