add MCP support

app/models/account_config.rb

@@ -57,6 +57,7 @@ class AccountConfig < ApplicationRecord
   DOCUMENT_FILENAME_FORMAT_KEY = 'document_filename_format'
   TEMPLATE_CUSTOM_FIELDS_KEY = 'template_custom_fields'
   POLICY_LINKS_KEY = 'policy_links'
+  ENABLE_MCP_KEY = 'enable_mcp'
 
   EMAIL_VARIABLES = {
     SUBMITTER_INVITATION_EMAIL_KEY => %w[template.name submitter.link account.name].freeze,

app/models/mcp_token.rb

@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: mcp_tokens
+#
+#  id           :bigint           not null, primary key
+#  archived_at  :datetime
+#  name         :string           not null
+#  sha256       :string           not null
+#  token_prefix :string           not null
+#  created_at   :datetime         not null
+#  updated_at   :datetime         not null
+#  user_id      :bigint           not null
+#
+# Indexes
+#
+#  index_mcp_tokens_on_sha256   (sha256) UNIQUE
+#  index_mcp_tokens_on_user_id  (user_id)
+#
+# Foreign Keys
+#
+#  fk_rails_...  (user_id => users.id)
+#
+class McpToken < ApplicationRecord
+  TOKEN_LENGTH = 43
+
+  belongs_to :user
+
+  before_validation :set_sha256_and_token_prefix, on: :create
+
+  attribute :token, :string, default: -> { SecureRandom.base58(TOKEN_LENGTH) }
+
+  scope :active, -> { where(archived_at: nil) }
+
+  private
+
+  def set_sha256_and_token_prefix
+    self.sha256 = Digest::SHA256.hexdigest(token)
+    self.token_prefix = token[0, 5]
+  end
+end

app/models/user.rb

@@ -62,6 +62,7 @@ class User < ApplicationRecord
   belongs_to :account
   has_one :access_token, dependent: :destroy
   has_many :access_tokens, dependent: :destroy
+  has_many :mcp_tokens, dependent: :destroy
   has_many :templates, dependent: :destroy, foreign_key: :author_id, inverse_of: :author
   has_many :template_folders, dependent: :destroy, foreign_key: :author_id, inverse_of: :author
   has_many :user_configs, dependent: :destroy