source adapter framework

tests/test_cli_api_polish.py

@@ -43,6 +43,7 @@ def test_mkt_docs_cli_generates_command_reference():
     assert result.exit_code == 0, result.output
     assert "# Markitect CLI Reference" in result.output
     assert "## `mkt extension commands`" in result.output
+    assert "## `mkt source normalize`" in result.output
     assert "## `mkt docs api`" in result.output
 
 
@@ -54,6 +55,7 @@ def test_mkt_docs_api_generates_public_api_reference():
     assert "query_document_jsonpath" in result.output
     assert "ExtensionDescriptor" in result.output
     assert "LocalSnapshotStore" in result.output
+    assert "SourceAdapterRegistry" in result.output
 
 
 def test_top_level_api_exports_newer_architecture_surfaces():
@@ -63,3 +65,5 @@ def test_top_level_api_exports_newer_architecture_surfaces():
     assert api.ExtensionDescriptor
     assert api.builtin_extension_registry
     assert api.validate_schema
+    assert api.SourceAdapterRegistry
+    assert api.normalize_source