docs: fix suggest_transform / apply_transform / Settings docstrings

[kgdunn]

Three surgical docstring fixes where the prose had drifted from the code.

1. src/scorepilot/core/profiling.py — suggest_transform (line 142)

The docstring described a "milder skew" branch, but the code has no such branch: both the LOG and POWER paths require strongly_skewed = summary.skewness > 1.0. The POWER branch is entered when a strongly-skewed variable fails either the positivity or the wide-range check, not when the skew is milder.

Rewritten to describe the actual branching, including the numeric thresholds (skewness > 1, min_max_ratio > 20) that the code applies.

2. src/scorepilot/core/transforms.py — apply_transform (line 17)

The Notes bullet for power claimed the default was c1 = 0.5 giving a signed root, but the signature default is c1: float = 0.0. The signed-root default actually comes from _transform_values, which special-cases 0.0 → 0.5:

exponent = c1 if c1 != 0.0 else 0.5
return np.sign(x) * np.abs(x) ** exponent

Rewrote the bullet to describe that behaviour explicitly and to note that c2 is ignored by this branch.

3. src/scorepilot/config.py — Settings class (line 15)

The Attributes block documented database_url, host, port, open_browser, and the four agent settings, but omitted the hardening knobs added later. Added auth_username / auth_password, docs_enabled, max_upload_mb, and max_cells with descriptions matching the inline comments already on the fields.

Version

Bumped pyproject.toml from 0.22.0 → 0.22.1 (PATCH — docs-only) and refreshed uv.lock per the repo's CLAUDE.md.

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