fix acts_as delegation to return self instead of RubyLLM

lib/ruby_llm/active_record/acts_as.rb

@@ -9,7 +9,7 @@ module ActsAs
       extend ActiveSupport::Concern
 
       class_methods do # rubocop:disable Metrics/BlockLength
-        def acts_as_chat(message_class: 'Message', tool_call_class: 'ToolCall') # rubocop:disable Metrics/MethodLength
+        def acts_as_chat(message_class: 'Message', tool_call_class: 'ToolCall')
           include ChatMethods
 
           @message_class = message_class.to_s
@@ -21,12 +21,6 @@ def acts_as_chat(message_class: 'Message', tool_call_class: 'ToolCall') # ruboco
                    dependent: :destroy
 
           delegate :complete,
-                   :with_tool,
-                   :with_tools,
-                   :with_model,
-                   :with_temperature,
-                   :on_new_message,
-                   :on_end_message,
                    :add_message,
                    to: :to_llm
         end
@@ -85,6 +79,36 @@ def to_llm
              .on_end_message { |msg| persist_message_completion(msg) }
       end
 
+      def with_tool(tool)
+        to_llm.with_tool(tool)
+        self
+      end
+
+      def with_tools(*tools)
+        to_llm.with_tools(*tools)
+        self
+      end
+
+      def with_model(model_id, provider: nil)
+        to_llm.with_model(model_id, provider: provider)
+        self
+      end
+
+      def with_temperature(temperature)
+        to_llm.with_temperature(temperature)
+        self
+      end
+
+      def on_new_message(&)
+        to_llm.on_new_message(&)
+        self
+      end
+
+      def on_end_message(&)
+        to_llm.on_end_message(&)
+        self
+      end
+
       def ask(message, &)
         message = { role: :user, content: message }
         messages.create!(**message)