fix(native): own complete metadata mappings and ambiguity

Resolve Go pointer descriptors and strings across complete, consistent file-backed spans, including PE headers and adjacent ELF load ranges. Reuse the canonical image-mapping selection for native exports. Preserve existing gaps, alias, zero-fill and capacity refusals.

Forward parsed zero-fill ownership through IL2CPP relocation tables, destinations and mapped-span checks. Distinguish missing spans from ambiguous ownership in the shared mapping failure: unresolved relocation targets may remain unknown, while ambiguous raw registration bytes cannot be reused as a resolved count.

Validation: parser, provider, service, native-export, IL2CPP and public CLI/MCP regressions cover PE32/PE32+ headers, split ELF descriptors/contents, relocation count conflicts, ordinary unresolved targets and unchanged inputs. Authored carriers establish static parsing, not Windows loading or actual legacy Go linker emission.

Fixes #6831
Fixes #6830

src/il2cpp/Il2cppBinaryImage.ts

@@ -237,7 +237,12 @@ export const readUInt32 = (
 
 export const isMapped = (image: NativeImage, address: bigint, size: number) => {
   try {
-    mappedFileOffset(image.container.mappings, address, size);
+    mappedFileOffset(
+      image.container.mappings,
+      address,
+      size,
+      image.container.zero_fills,
+    );
     return true;
   } catch (cause) {
     if (cause instanceof BinaryFormatFailure) return false;