plot_pool_weights score annotation can spill past the axis for weights near 1

[thomaspinder]

Context

Found during review of #164 (issue #151). plot_pool_weights places the per-model score annotation at w + 1% with xlim max(1, 1.05*w).

Problem

A long annotation (e.g. log score -1,234.5) overflows the right axis when a model's weight is near 1.

Suggested approach

Clip the annotation position, or place the text inside the bar when the bar occupies most of the axis.

Affected files

• src/impulso/plotting/_pooling.py