fix(native): preserve parsed section and architecture facts

Classify lipo parse failures once for native and artifact consumers, retain valid read-only ELF ranges independently of optional section names, and map IL2CPP reader architecture through the existing CPU identity owner before Mach-O parsing.

Regression-first checks reproduced malformed lipo output, lost unnamed-section compiler paths, and the amd64/x86_64 adapter mismatch. Focused parser, artifact, Rust CLI/MCP, Go, and IL2CPP controls passed; authored fixtures do not establish real-provider behavior.

Fixes #5982

Fixes #3397

src/il2cpp/Il2cppBinaryImage.ts

@@ -2,6 +2,7 @@ import {
   readFatContainerHeader,
   validateFatSlice,
 } from "../domain/apple/machoContainer.js";
+import { binaryMetadataArchitecture } from "../domain/binaryMetadataArchitecture.js";
 import {
   BinaryFormatFailure,
   BinaryResourceFailure,
@@ -144,7 +145,11 @@ export function* openImageSteps(
   let machoPointerFixups: PointerFixups | undefined;
   if (container.format === "macho") {
     try {
-      const layout = parseMachoLayout(image, container.architecture);
+      const layout = parseMachoLayout(
+        image,
+        binaryMetadataArchitecture(container.architecture) ??
+          container.architecture,
+      );
       machoPointerFixups = parsePointerFixups(
         image,
         layout.fixups,