feat: Add support for DynamicAssertions in JSON format

[gpeacock]

This allows DynamicAssertions to create JSON formatted assertions. Previously only Cbor formatted assertions were supported.

[codecov]

Codecov Report

Attention: Patch coverage is 86.20690% with 4 lines in your changes missing coverage. Please review.

Project coverage is 78.91%. Comparing base (1cda7bd) to head (750a2fa).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
sdk/src/store.rs	80.95%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #924      +/-   ##
==========================================
- Coverage   78.91%   78.91%   -0.01%     
==========================================
  Files         147      147              
  Lines       34805    34819      +14     
==========================================
+ Hits        27466    27476      +10     
- Misses       7339     7343       +4     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[scouten-adobe]

One minor change requested (see earlier comment); otherwise 👍