feat: Global settings redux

[cdmurph32]

Changes in this pull request

Using the C2PA SDK in work-stealing thread scheduling runtimes (like tokio), will lead to inconsistent settings application with thread_local settings

Run Reader and Builder unit tests single threaded. An alternate strategy would be to allow local settings to be passed as an argument to Reader and Builder.

Checklist

• This PR represents a single feature, fix, or change.
• All applicable changes have been documented.
• Any TO DO items (or similar) have been entered as GitHub issues and the link to that issue has been included in a comment.

[codecov]

Codecov Report

❌ Patch coverage is 28.57143% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 28.41%. Comparing base (0302f47) to head (7032ffa).

Files with missing lines	Patch %	Lines
sdk/src/settings/mod.rs	28.57%	25 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (0302f47) and HEAD (7032ffa). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (0302f47)	HEAD (7032ffa)
	3	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1529       +/-   ##
===========================================
- Coverage   78.03%   28.41%   -49.63%     
===========================================
  Files         162      144       -18     
  Lines       40266    27795    -12471     
===========================================
- Hits        31423     7898    -23525     
- Misses       8843    19897    +11054     

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[codspeed-hq]

CodSpeed Performance Report

Merging #1529 will not alter performance

_{Comparing global_settings_redux (7032ffa) with main (0302f47)}

Summary

✅ 16 untouched
⏩ 2 skipped¹

Footnotes

1. 2 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩