audit(2A): include-dependency tool, 2V0-2V3 slice unit lists and batch-2 order

port_deps.py resolves explicit #include edges plus the implicit edges each
40250 library's StdAfx.h supplies (symbol index restricted to StdAfx-visible
headers), writes cumulative slice lists and the P0 topological order.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.agents/skills/metin2-40250-parity-audit/SKILL.md

@@ -148,6 +148,9 @@ behavior verified from code inspection alone.
   — function inventory (active `.vcxproj` sources + the 40250 Python root), progress per library and
   per layer, and tag/port-map/layout consistency. Run `check` before every commit that touches
   `audit/port-map/`.
+- `scripts/port_deps.py closure <file> | slices [--write] | order [--write]` — `#include` graph with the
+  implicit edges each library's `StdAfx.h` supplies; writes the 2V0-2V3 unit lists and the batch-2
+  topological order to `audit/slices/`. Regenerate after changing a slice definition.
 - `scripts/py_embed_spike.py` (Python 2.7) — runs the 40250 `system.py` bootstrap with stub native
   modules; used by the embedded-Python evaluation.
 - `scripts/audit_ledger.py refresh --write | report --write | validate` — run once per batch, not