Detect CSV/TSV column types by default

[simonw]

Claude Code: https://gistpreview.github.io/?aaa3805fa83ebf1660398eb21d8298f5

Refs:

• Make --detect-types the default behavior in 4.0 #679

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📚 Documentation preview 📚: https://sqlite-utils--683.org.readthedocs.build/en/683/

[simonw]

Fix failing tests: https://gistpreview.github.io/?be536ebc461432754f474fb4da600874

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.32%. Comparing base (0bbc680) to head (2a958bc).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #683   +/-   ##
=======================================
  Coverage   95.32%   95.32%           
=======================================
  Files           8        8           
  Lines        3014     3014           
=======================================
  Hits         2873     2873           
  Misses        141      141           

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