Jmafoster1/named confidence intervals

[jmafoster1]

Previously, the logistic regression estimator produced results as

"result": {
      "treatment": "X",
      "outcome": "Y",
      "adjustment_set": [],
      "effect_measure": "unit_odds_ratio",
      "effect_estimate": {
        "0": 3.00
      },
      "ci_low": {
        "0": 2.64
      },
      "ci_high": {
        "0": 3.40
      }
}

This was somewhat confusing, especially for numeric (i.e. non-categorical) treatments. I have now made it so it indexes by name instead

"result": {
      "treatment": "X",
      "outcome": "Y",
      "adjustment_set": [],
      "effect_measure": "unit_odds_ratio",
      "effect_estimate": {
        "X": 3.00
      },
      "ci_low": {
        "X": 2.64
      },
      "ci_high": {
        "X": 3.40
      }
}

Categorical treatments are indexed as

"result": {
      "treatment": "X",
      "outcome": "Y",
      "adjustment_set": [],
      "effect_measure": "unit_odds_ratio",
      "effect_estimate": {
        "X[T.red]": 3.00,
        "X[T.blue]": -2.21
      },
      "ci_low": {
        "X[T.red]": 2.64,
        "X[T.blue]": -3.18
      },
      "ci_high": {
        "X[T.red]": 3.40,
        "X[T.blue]": -1.87
      }
}

This PR also fixes a minor bug from #365 where test adequacy would always be set to True, and makes the commandline arguments consistently use - as a delimiter, e.g. --dag_path -> --dag-path

[github-actions]

🦙 MegaLinter status: ✅ SUCCESS

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	black	33		0	0.96s
✅ PYTHON	pylint	33		0	6.18s

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.64%. Comparing base (8185ad8) to head (30a4250).
⚠️ Report is 9 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #369      +/-   ##
==========================================
+ Coverage   96.31%   96.64%   +0.32%     
==========================================
  Files          28       28              
  Lines        1603     1608       +5     
==========================================
+ Hits         1544     1554      +10     
+ Misses         59       54       -5     

Files with missing lines	Coverage Δ
...esting/estimation/logistic_regression_estimator.py	100.00% <100.00%> (ø)
causal_testing/main.py	100.00% <100.00%> (+2.05%)	⬆️

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