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-2026-112619/CVE-2026-112619.swift

@@ -1,23 +1,8 @@
 // cal.unzip · CalendarFoundation · _UnzipArchiveWithLimits · CVE-2026-112619
-// 原语: OOB 写 · 系统进程 · tier 3
-// Primitive: OOB write · system process · tier 3
-//
-// [zh] 日历附件解压容器逃逸
-// 27.2 将 _UnzipArchive（288 B，无任何限制）替换为 _UnzipArchiveWithLimits（2040 B），并新增 _CalUnzipEntryDestinationPath
-// / _CalUnzipParentIsContained / _CalUnzipTrackTopLevelPath 与 isSymbolicLinkAtURL。ICS 解析器本身未作改动 ——
-// 修复全部位于附件归档的解压遏制层。
-//
-// [en] Calendar attachment extraction containment
-// iOS 27.2 replaces _UnzipArchive (288 B, no limits at all) with _UnzipArchiveWithLimits (2040 B)
-// and adds _CalUnzipEntryDestinationPath / _CalUnzipParentIsContained / _CalUnzipTrackTopLevelPath
-// plus isSymbolicLinkAtURL. The ICS parser itself is untouched — the whole fix sits in the attachment
-// archive extraction containment layer.
-// ── 判别 / oracle ──
-// 应用侧可以验证 CalendarFoundation 的类与方法是否可见，以及本进程里 libarchive 的路径穿越是否被拦住（用 ../ 名字的归档试）。
-
+// Calendar attachment extraction containment
 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)] }
@@ -39,4 +24,3 @@ enum B {
 }
 
 
-