Investigate Open Table SnapshotPreviews issues

[sentry-junior]

Investigate SnapshotPreviews issues surfaced during the Open Table customer sync.

Issues to investigate:

• Framework distribution: Open Table prefers using SnapshotPreviews as a framework rather than a SwiftPackage. They report a provided script for framework conversion fails for one of the libraries. Need to reproduce and determine whether we fix the script or improve framework support directly.
• PreviewGallery in TestFlight builds: Open Table asked whether PreviewGallery works in TestFlight/release builds. Distribution method has no effect on the gallery, but Apple recommends stripping previews from release builds, so previews won't be compiled by default. Related: EmergeTools/SnapshotPreviews#220 (docs gap on debug-only behavior).

Next steps:

• Get more detail from Open Table on which library/script failed during framework conversion
• Review existing framework conversion script and test it
• Clarify documentation around release build behavior

Action taken on behalf of Cameron Cooke.