fix(quickadapter): enforce reversal NATR fraction bounds (#140)

fix(quickadapter): enforce reversal NATR fraction bounds (#140)

Enforce the documented [0, 1] upper bound for both reversal NATR multiplier
fractions at the configuration boundary:

- reject config values above 1 (warn and fall back per component)
- fail fast with ValueError when canonical defaults exceed max_value
- canonicalize the out-of-range component warning to the single
  "<= {max_value}" form, dropping the wrong "[-inf, x]" notation
- clarify the strict min < max ordering in the README tunables table with
  symmetric "(< upper bound)" / "(> lower bound)" hints

Fixes #137