feat: major architectural refactor

- Refactor memory system (episodic/STM/LTM with components)
- Implement complete subtitle domain (scanner, matcher, placer)
- Add YAML workflow infrastructure
- Externalize knowledge base (patterns, release groups)
- Add comprehensive testing suite
- Create manual testing CLIs

tests/test_agent.py

@@ -49,7 +49,7 @@ class TestExecuteToolCall:
     def test_execute_known_tool(self, memory, mock_settings, mock_llm, real_folder):
         """Should execute known tool."""
         agent = Agent(settings=mock_settings, llm=mock_llm)
-        memory.ltm.set_config("download_folder", str(real_folder["downloads"]))
+        memory.ltm.download_folder = str(real_folder["downloads"])
 
         tool_call = {
             "id": "call_123",
@@ -145,7 +145,7 @@ class TestStep:
         self, memory, mock_settings, mock_llm_with_tool_call, real_folder
     ):
         """Should execute tool and continue."""
-        memory.ltm.set_config("download_folder", str(real_folder["downloads"]))
+        memory.ltm.download_folder = str(real_folder["downloads"])
 
         agent = Agent(settings=mock_settings, llm=mock_llm_with_tool_call)
 
@@ -229,8 +229,8 @@ class TestAgentIntegration:
 
     def test_multiple_tool_calls(self, memory, mock_settings, mock_llm, real_folder):
         """Should handle multiple tool calls in sequence."""
-        memory.ltm.set_config("download_folder", str(real_folder["downloads"]))
-        memory.ltm.set_config("movie_folder", str(real_folder["movies"]))
+        memory.ltm.download_folder = str(real_folder["downloads"])
+        memory.ltm.movie_folder = str(real_folder["movies"])
 
         call_count = [0]