feat: add Captain::Scenario Model and API [CW-4597] (#11907)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

enterprise/app/models/captain/assistant.rb

@@ -30,6 +30,7 @@ class Captain::Assistant < ApplicationRecord
            through: :captain_inboxes
   has_many :messages, as: :sender, dependent: :nullify
   has_many :copilot_threads, dependent: :destroy_async
+  has_many :scenarios, class_name: 'Captain::Scenario', dependent: :destroy_async
 
   validates :name, presence: true
   validates :description, presence: true

enterprise/app/models/captain/scenario.rb

@@ -0,0 +1,44 @@
+# == Schema Information
+#
+# Table name: captain_scenarios
+#
+#  id           :bigint           not null, primary key
+#  description  :text
+#  enabled      :boolean          default(TRUE), not null
+#  instruction  :text
+#  title        :string
+#  tools        :jsonb
+#  created_at   :datetime         not null
+#  updated_at   :datetime         not null
+#  account_id   :bigint           not null
+#  assistant_id :bigint           not null
+#
+# Indexes
+#
+#  index_captain_scenarios_on_account_id                (account_id)
+#  index_captain_scenarios_on_assistant_id              (assistant_id)
+#  index_captain_scenarios_on_assistant_id_and_enabled  (assistant_id,enabled)
+#  index_captain_scenarios_on_enabled                   (enabled)
+#
+class Captain::Scenario < ApplicationRecord
+  self.table_name = 'captain_scenarios'
+
+  belongs_to :assistant, class_name: 'Captain::Assistant'
+  belongs_to :account
+
+  validates :title, presence: true
+  validates :description, presence: true
+  validates :instruction, presence: true
+  validates :assistant_id, presence: true
+  validates :account_id, presence: true
+
+  scope :enabled, -> { where(enabled: true) }
+
+  before_save :populate_tools
+
+  private
+
+  def populate_tools
+    # TODO: Implement tools population logic
+  end
+end