Translate StructuredData parity tests

RUSTREWRITE.md

@@ -59,8 +59,9 @@ The current workspace is a structural baseline, not a working client:
   members with real fields/constants/enum values and standardized failing
   bodies;
 - all 1,289 discovered NUnit `[Test]`/`[TestCase]` cases have compiling Rust test
-  entries; 17 Types/Utilities cases are semantically translated and the other
-  1,272 intentionally panic with their source identity and body hash;
+  entries; 17 Types/Utilities and 78 StructuredData cases are semantically
+  translated and the other 1,194 intentionally panic with their source identity
+  and body hash;
 - all nine sample/tool projects have compiling Rust binary targets;
 - the 128 TestClient command source files are retained as a command inventory.
 
@@ -331,7 +332,7 @@ markers in hand-written Rust files, so regeneration writes only unresolved
 placeholders and fails on body drift. The checked-in audit reports pending,
 translated, ignored-live, benchmark, drifted, missing, duplicate, stale, and
 unreviewed cases. The initial handover contained 1,289 unreviewed cases; the
-current ledger contains 17 translated/reviewed and 1,272 pending cases.
+current ledger contains 95 translated/reviewed and 1,194 pending cases.
 
 The Rust tests must call the public APIs rather than internal replacements.
 Where the C# tests call internal members through friend-assembly access, record