feat: Python porting workspace with reference data and parity audit

src/Tool.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+
+
+@dataclass(frozen=True)
+class ToolDefinition:
+    name: str
+    purpose: str
+
+
+DEFAULT_TOOLS = (
+    ToolDefinition('port_manifest', 'Summarize the active Python workspace'),
+    ToolDefinition('query_engine', 'Render a Python-first porting summary'),
+)