Drop deny lints, eager Debug impls are a mixed blessing

[djc]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.90%. Comparing base (334565c) to head (9fa0d31).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1753   +/-   ##
=======================================
  Coverage   90.90%   90.90%           
=======================================
  Files          39       39           
  Lines       16262    16262           
=======================================
  Hits        14783    14783           
  Misses       1479     1479           

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