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/application/conftest.py

@@ -0,0 +1,41 @@
+"""Fixtures for application-layer tests."""
+
+import shutil
+import tempfile
+from pathlib import Path
+
+import pytest
+
+from alfred.infrastructure.persistence import Memory, set_memory
+
+
+@pytest.fixture
+def app_temp(tmp_path):
+    """Real folder structure: downloads, movies, tv_shows, torrents."""
+    (tmp_path / "downloads").mkdir()
+    (tmp_path / "movies").mkdir()
+    (tmp_path / "tv_shows").mkdir()
+    (tmp_path / "torrents").mkdir()
+    return tmp_path
+
+
+@pytest.fixture
+def memory_configured(app_temp, tmp_path):
+    """
+    Fresh Memory with library_paths and workspace configured using the real API.
+    Replaces the broken memory_with_config from root conftest for these tests.
+    """
+    import tempfile, os
+    storage = tempfile.mkdtemp()
+    mem = Memory(storage_dir=storage)
+    set_memory(mem)
+
+    mem.ltm.workspace.download = str(app_temp / "downloads")
+    mem.ltm.workspace.torrent = str(app_temp / "torrents")
+    mem.ltm.library_paths.set("movie", str(app_temp / "movies"))
+    mem.ltm.library_paths.set("tv_show", str(app_temp / "tv_shows"))
+    mem.save()
+
+    yield mem
+
+    shutil.rmtree(storage, ignore_errors=True)