log unsupported files at debug level

[bzimmer]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.72%. Comparing base (f61fc85) to head (4a73da1).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #94   +/-   ##
=======================================
  Coverage   81.72%   81.72%           
=======================================
  Files          15       15           
  Lines        1390     1390           
=======================================
  Hits         1136     1136           
  Misses        203      203           
  Partials       51       51           

Files	Coverage Δ
up.go	85.84% <100.00%> (ø)

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f61fc85...4a73da1. Read the comment docs.