chore: enable 11 additional ruff lint rule sets

[ssrhaso]

Enable 11 previously-disabled ruff rule sets via config-only changes to pyproject.toml. No Python source files were modified.

Enabled rule sets

C4, DTZ, E, EM, PD, PLR, PLW, RET, S, SIM, T20

Left disabled

ERA - 42 violations across tests, notebooks, and source files. Better suited as a dedicated cleanup PR.

Strategy

• Threshold tuning: max-args = 12, max-returns = 10
• Global ignores (9 rules): E501, PD009, PD010, PD013, PLR2004, RET504, S101, S301
• Per-file-ignores: targeted suppression for 8 file patterns
• Cleanup: removed old commented-out ANN101 and S301 lines

Future refactoring candidates

Per-file-ignores that could be removed after dedicated cleanup PRs:

• acro/acro_tables.py - PLR0913, PLR1714, SIM102, SIM108, PLW2901, EM, PD002, PD011, PD101
• acro/acro_stata_parser.py - C417, PLR5501, T20
• acro/record.py - DTZ005, EM, PLW2901, T20
• acro/acro.py - SIM113
• acro/utils.py - PD002
  @rpreen

Closes #348

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.70%. Comparing base (fe1f204) to head (1f6ed23).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #373   +/-   ##
=======================================
  Coverage   99.70%   99.70%           
=======================================
  Files           9        9           
  Lines        1354     1354           
=======================================
  Hits         1350     1350           
  Misses          4        4           

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