v2.0 — 31 C POC twins + harness fixes

- 31 C POC files, one per CVE folder: full seed construction + trigger +
  main(), self-contained, no app dependency. All compile clean with
  clang -O2 -Wall (zero warnings) on macOS arm64; each has a recorded
  oracle on this host.
- CMGetDMVersionLevelFromRPU ABI pinned by disassembly: macOS export is
  (CFDataRef), the Swift POC drives the 4-arg iOS surface — this is the
  mechanism behind the cm.rpu death oracle on the simulator build.
- Harness fixes: glyphCount guard, MachOInspector size guard, ModTools
  clamp, DeviceModel iPhone19,7, GPTPayload clamps, Gate patch display.
- POC comments rewritten English-only (31 swift + arc.rr + 5 py).
- README (en/zh): C twin column, .c anatomy section, compile/run
  examples, C oracle verification status.
- Dead if-let binding removed from Identity summary; v2.0 build 3.

CVE-2026-112485/CVE-2026-112485.swift

@@ -1,24 +1,9 @@
 // mdl.usda · Model I/O · libusd_ms · CVE-2026-112485
-// 原语: OOB 读 · 进程内 · tier 2
-// Primitive: OOB read · in-process · tier 2
-//
-// [zh] USDA 声明嵌套深度
-// Model I/O 的修复载体为 libusd_ms 24.1.30 → 24.1.32：经 64 位检查的图像分配、Ptex log2 与页保护、USDA 声明嵌套上限、SdfZipFile
-// 尺寸检查。ModelIO.dylib 自身不含任何修复。
-//
-// [en] USDA declaration nesting depth
-// The fix carrier for Model I/O is libusd_ms 24.1.30 → 24.1.32: 64-bit checked image allocation,
-// Ptex log2 and page guards, a USDA declaration nesting cap, and SdfZipFile size checks. ModelIO.dylib
-// itself carries none of the fix.
-// ── 判别 / oracle ──
-// 2000 层嵌套的 def Xform。27.2 会在嵌套上限处拒绝，27.0 递归下去。
-//
-// 种子构建器（python，可直接运行）: CVE-2026-112485/CVE-2026-112485.py
-// runnable python seed builder: CVE-2026-112485/CVE-2026-112485.py
-
+// USDA declaration nesting depth
+// Standalone builder: CVE-2026-112485.py
 import Foundation
 
-// ── byte helpers — verbatim from Cinder27 Sources/Kit.swift ──
+// ── byte helpers (from Cinder27 Sources/Kit.swift) ──
 enum B {
     static func be16(_ v: UInt16) -> [UInt8] { [UInt8(v >> 8 & 0xff), UInt8(v & 0xff)] }
     static func le16(_ v: UInt16) -> [UInt8] { [UInt8(v & 0xff), UInt8(v >> 8 & 0xff)] }
@@ -40,4 +25,3 @@ enum B {
 }
 
 
-