Add dedicated user_api_key_clients table to allow for 1:many use cases (#28119)

app/models/user_api_key_client.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+class UserApiKeyClient < ActiveRecord::Base
+  has_many :keys, class_name: "UserApiKey", dependent: :destroy
+
+  def self.invalid_auth_redirect?(auth_redirect, client: nil)
+    return false if client&.auth_redirect == auth_redirect
+    SiteSetting
+      .allowed_user_api_auth_redirects
+      .split("|")
+      .none? { |u| WildcardUrlChecker.check_url(u, auth_redirect) }
+  end
+end
+
+# == Schema Information
+#
+# Table name: user_api_key_clients
+#
+#  id               :bigint           not null, primary key
+#  client_id        :string           not null
+#  application_name :string           not null
+#  public_key       :string
+#  auth_redirect    :string
+#  created_at       :datetime         not null
+#  updated_at       :datetime         not null
+#
+# Indexes
+#
+#  index_user_api_key_clients_on_client_id  (client_id) UNIQUE
+#