feat: Python porting workspace with reference data and parity audit

src/upstreamproxy/__init__.py

@@ -0,0 +1,16 @@
+"""Python package placeholder for the archived `upstreamproxy` subsystem."""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+SNAPSHOT_PATH = Path(__file__).resolve().parent.parent / 'reference_data' / 'subsystems' / 'upstreamproxy.json'
+_SNAPSHOT = json.loads(SNAPSHOT_PATH.read_text())
+
+ARCHIVE_NAME = _SNAPSHOT['archive_name']
+MODULE_COUNT = _SNAPSHOT['module_count']
+SAMPLE_FILES = tuple(_SNAPSHOT['sample_files'])
+PORTING_NOTE = f"Python placeholder package for '{ARCHIVE_NAME}' with {MODULE_COUNT} archived module references."
+
+__all__ = ['ARCHIVE_NAME', 'MODULE_COUNT', 'PORTING_NOTE', 'SAMPLE_FILES']