No merge: Initial BMFF embeddable support experiment

[mauricefisher64]

Changes in this pull request

Give a narrative description of what has been changed.

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 65.59140% with 192 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.58%. Comparing base (355d27a) to head (2d4b969).
⚠️ Report is 98 commits behind head on main.

Files with missing lines	Patch %	Lines
sdk/src/assertions/bmff_hash.rs	49.06%	82 Missing ⚠️
c2pa_c_ffi/src/c_api.rs	67.94%	75 Missing ⚠️
sdk/src/store.rs	73.33%	20 Missing ⚠️
sdk/src/utils/hash_utils.rs	30.76%	9 Missing ⚠️
sdk/src/builder.rs	89.28%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1808      +/-   ##
==========================================
- Coverage   76.64%   76.58%   -0.06%     
==========================================
  Files         172      172              
  Lines       39927    40395     +468     
==========================================
+ Hits        30601    30937     +336     
- Misses       9326     9458     +132     

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[codspeed-hq]

Merging this PR will not alter performance

✅ 16 untouched benchmarks
⏩ 2 skipped benchmarks¹

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_{Comparing emeddable_bmff (2d4b969) with main (355d27a)}

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. ↩

[mauricefisher64]

Work merged as part of another PR