Address review findings in trace_dylib_resolution:
- Choose child slices by dyld's graded architectures, so an x86_64h
process loads a generic x86_64 slice instead of reporting
architecture-missing.
- Read FAT containers with the byte-swapped FAT_CIGAM and FAT_CIGAM_64
magics, which target opening already accepts.
- Report string-bearing load commands too short to hold their string
offset as malformed instead of failing with a RangeError.
- Keep recognized but unsupported images as an `unsupported` candidate
outcome. It is undeterminable like an outside-root path, not
malformed.
- List Mach-O files that do not parse during root enumeration as
unparsed images, so coverage is partial rather than silently complete.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
a0ec3e2016