feat(plugins): add source-aware evidence and recording timelines

tests/unit/core/test_platform.py

@@ -37,8 +37,9 @@ def test_platform_singleton():
     assert p.process.path_separator in (":", ";")
 
 
-def test_linux_platform_paths():
+def test_linux_platform_paths(monkeypatch):
     """Verify Linux platform paths conform to XDG Base Directory specification."""
+    monkeypatch.delenv("ARTEMIS_APP_DIR", raising=False)
     with patch.dict(
         "os.environ",
         {"XDG_CONFIG_HOME": "/tmp/test_xdg_config", "XDG_DATA_HOME": "/tmp/test_xdg_data"},
@@ -61,8 +62,9 @@ def test_darwin_platform_paths():
     assert darwin_p.process.path_separator == ":"
 
 
-def test_windows_platform_paths():
+def test_windows_platform_paths(monkeypatch):
     """Verify Windows platform paths adhere to AppData standards."""
+    monkeypatch.delenv("ARTEMIS_APP_DIR", raising=False)
     with patch.dict(
         "os.environ",
         {