fix(agc): ignore Finder .DS_Store files in capture directories

[jotitadev]

What

Follow-up to #6259. On macOS, Finder writes a .DS_Store file into any folder it shows, so opening the compute capture directory in Finder made the next new capture fail with capture directory contains an unexpected entry. With WriteOptional that error is not swallowed, so it reaches the caller like any other invalid directory. The author of #6259 confirmed it and asked for a separate PR (#6259 (comment)).

The scan shared by Write and WriteOptional now skips an entry only when it is a regular file named exactly .DS_Store. Skipped entries do not count toward the 128-entry or 256 MiB bounds. Everything else is unchanged: other files (including other dot-files), a symbolic link named .DS_Store and a directory named .DS_Store are still rejected, so --optional-invalid keeps failing on a foreign entry as before.

The --optional-invalid case now writes a .DS_Store into a fresh capture directory, checks that Write and WriteOptional both add a record and leave the file alone, then adds the existing foreign file and checks that Write (with its diagnostic) and WriteOptional still reject the directory.

Tested

macOS 27.2 on an Apple M2 Max, Xcode 27.0 (Apple clang 21.0.0, libc++). Base: main fd423f9 (this head a51bb03 merges cleanly onto it). libSceAgcDriver does not build on macOS yet, so I built tests/ComputePipelineCapture.cpp standalone with Execution/src/ComputePipelineCapture.cpp (-std=c++20 -O2, Vulkan SDK 1.4.363 headers), for -arch arm64 and -arch x86_64 (run under Rosetta). Every mode: default, --optional-entry-cap, --optional-byte-cap, --optional-io, --optional-invalid.

• Test from this branch, scan from main: --optional-invalid fails with capture directory contains an unexpected entry on both architectures; the other four modes pass.
• Test and scan from this branch: 5/5 pass on both architectures.
• Test from main, scan from this branch: 5/5 pass on both architectures (the foreign entry is still rejected).

Not run: the CTest targets on Linux or Windows (full build).

Checklist

• Based on current main; no other open PR implements the same functions
• One topic per PR; follow-ups go in a new PR
• No comments in code except technical debt
• Unimplemented paths throw (NotImplemented_nid_no_patch); silent stubs are listed under Silent stubs in their library's technical debt file
• No notes, investigation .md files or images added to the repository (attach them to this PR)
• New third-party code is a submodule built from source
• Generic behaviour, not specific to one title
• Depends on: none (fix(agc): stop optional compute captures at their bounds #6259 is merged)
• Unblocks: none
• GPUs tested: n/a (the capture code and its test do not use a GPU)
• AI-assisted: yes (Claude Code)

🤖 Generated with Claude Code

[github-actions]

Some comparisons could not be completed because a pull request conflicts with the base branch. Review these shared files manually before concluding that there is no overlap.

Pull request	Shared files not compared
PR 8004	core/libs/prx/libSceAgcDriver/Execution/src/ComputePipelineCapture.cpp core/libs/prx/libSceAgcDriver/tests/ComputePipelineCapture.cpp