[devmotion]

Removes the Compat dependency (stack is available in all supported Julia versions), moves test dependencies into a test/Project.toml workspace project, and bumps the version to 1.74.2.

This re-submits 03ff6dd, which was accidentally pushed directly to main and has since been reverted in 68d8bf5. Compared to that commit, test/Project.toml now correctly lists ChainRules (instead of ChainRulesCore) under [sources] with path = "..", and adds ChainRules to [deps].

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.57%. Comparing base (68d8bf5) to head (b1652a2).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #851   +/-   ##
=======================================
  Coverage   96.57%   96.57%           
=======================================
  Files          28       28           
  Lines        3618     3618           
=======================================
  Hits         3494     3494           
  Misses        124      124           

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