feat: Support reading .NET 11 Android assembly stores

[jamescrosswell]

Stacked on #5575 (itself stacked on #5574) — this PR's diff is only the index-entry sizing change. Together the three PRs make .NET 11 Android APKs readable for symbolication.

Closes #5454

Summary

• StoreReader.Prepare() inferred the index entry layout from the ABI bitness (64-bit hash on 64-bit ABIs), plus a compile-time #if NET10_0_OR_GREATER for the ignore byte. But upstream's generator picks the hash width by runtime: CoreCLR writes 32-bit CRC32 name hashes on every ABI, MonoVM writes xxHash sized by bitness (AssemblyStoreGenerator.cs). A .NET 11 x86_64 store has 60 entries in 540 bytes — 9 bytes each — so we read past the index and Prepare() threw EndOfStreamException.
• The entry size is now index_size / index_entry_count, as upstream does. Only the two v3/v4 layouts (9 and 13 bytes) are accepted; anything else, or a size that doesn't divide evenly, throws as a corrupt index. Upstream's v2 layouts are intentionally not ported (v2 support was dropped in feat: add support for .NET 11 preview 7 #5529).
• The dead #if NET10_0_OR_GREATER branch is gone.
• Debug images on CoreCLR. Reading the store isn't enough on its own: on .NET 11 Module.FullyQualifiedName is <Unknown> for assemblies loaded from the store, so DebugStackTrace returned before ever calling the assembly reader and events had no debug_meta. When an assembly reader is configured it now falls back to Module.ScopeName (the file name the store is indexed by). Modules that do have a location still pass FullyQualifiedName, so Mono behaviour is unchanged.
• ATTRIBUTION.txt now records the v3 and v4 upstream sync points, not just the original baseline.

Tests

• The net11.0 APK tests in AndroidAssemblyReaderTests are re-enabled — 29 run on net11.0 (previously 9); the 8 still skipped are the Mono AOT permutations .NET 11 can't produce.
• CreatesCorrectArchiveReader now expects an AndroidAssemblyStoreReader on .NET 11: the AndroidUseAssemblyStore=false APK contains only libassembly-store.so, because the CoreCLR host has no non-store fallback since dotnet/android#12033.
• StoreReaderTests gains a CoreCLR-style v4 64-bit store with 32-bit hashes, plus corrupt-index cases (the 12-byte v2 layout and a non-divisible index size).

Example

Symbolicated stack trace from a .NET 11 app

Notes

• Carries two small follow-ups to review comments on the merged feat: Support Zstandard-compressed assemblies on Android (.NET 11) #5575: ArchiveUtils no longer allocates the output buffer before failing on a Zstandard payload it can't decompress, and the tests share ArchiveUtils' magic constants.
• Verified end to end with Sentry.Samples.Android (Release, net11.0-android37.0, arm64 emulator, API 37): the SDK reads the app assembly from the Zstandard-compressed v4 store, the captured event carries a pe_dotnet debug image with the PDB's debug ID, frames have addr_mode/function_id, and the matching PDB is uploaded by the build.
• That only holds with the default trim mode. With AndroidLinkMode=full (which the Android sample sets) the trimmer rewrites app assemblies, and the Android SDK forces TrimmerRemoveSymbols=true in Release, so the packaged assemblies have no debug ID to report. That's independent of this PR and of .NET 11.
• Removing the skips also re-enables these tests in the Android device test run, which reads the running app's own .NET 11 APK — that's the first on-device coverage of the whole v4 + Zstandard path.
• The ELF _assembly_store symbol item was dropped from Port upstream AssemblyStore reader changes: v4/CoreCLR format, _assembly_store symbol, index-entry sizing (next major) #5454 as unnecessary — see this comment.

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 5 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (version7@aa02031). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
src/Sentry/Internal/DebugStackTrace.cs	62.50%	2 Missing and 1 partial ⚠️
...rc/Sentry.Android.AssemblyReader/V2/StoreReader.cs	81.81%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             version7    #5577   +/-   ##
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  Coverage            ?   74.80%           
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  Files               ?      515           
  Lines               ?    18919           
  Branches            ?     3693           
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  Hits                ?    14153           
  Misses              ?     3890           
  Partials            ?      876           

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[lucas-zimerman]

This condition makes it so that var outputStream = new MemoryStream(decompressedLength); on line 53 never gets used. Would be nice to not initialize on this NET10 or lower.