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-2026-112610/CVE-2026-112610.swift

@@ -1,21 +1,8 @@
 // cg.cmap · CoreGraphics · _cmap_convert · CVE-2026-112610
-// 原语: OOB 写 · 进程内 · tier 3
-// Primitive: OOB write · in-process · tier 3
-//
-// [zh] CMap /UseCMap 递归越界写（负结果探针）
-// _cmap_convert 在递归时把外层的 codespace 长度（最大 255）传入仅容纳单个结果的输出槽（2 字节 code / 8 字节 len）。27.2 增加 min(L,4)
-// 钳制并重排输出槽布局。
-//
-// [en] CMap /UseCMap recursion out-of-bounds write (negative-result probe)
-// _cmap_convert passes the outer codespace length (up to 255) into an output slot sized for a single
-// result (2-byte code / 8-byte len) when it recurses. iOS 27.2 adds a min(L,4) clamp and re-lays
-// out the output slots.
-// ── 判别 / oracle ──
-// 源分析中，内嵌 CMap 这一载体被三条相互独立的可达性阻断否定。本模块的价值在于将负结果同样留档：若该构建上出现崩溃，说明载体已被重新打通，结论需随之修正。
-
+// CMap /UseCMap recursion out-of-bounds write (negative-result probe)
 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)] }
@@ -36,7 +23,7 @@ enum B {
     static func ascii(_ s: String) -> [UInt8] { Array(s.utf8) }
 }
 
-// ── 种子构造 / seed construction — verbatim from Cinder27 Sources (PDFPayload) ──
+// ── seed construction (from Cinder27 Sources: PDFPayload) ──
 enum PDFPayload {
 struct PDFBuilder {
     private var objects: [Int: (dict: String, stream: [UInt8]?)] = [:]