Families: Inconsistent characteristic computation logic

[MyznikovFD]

Families: Inconsistent characteristic computation logic

Problem Description

Characteristic computation should use only base parametrization, but current implementation has unnecessary complexity allowing non-base parametrizations.

Current Behavior

In parametric_family.py, the _analytical_plan construction and _build_analytical_computations method allow characteristics to be computed using either:

• The current parametrization (if available)
• The base parametrization (as fallback)

Expected Behavior

All characteristics should be computed through base parametrization consistently.

Files Affected

• pysatl_core/families/parametric_family.py