Seed ml translation: functions (calibration round 2, v0.3 rules)

Regenerated under the round-1 rules rather than reopening the stale
2026-08-03 seed: engine QuantEcon/action-translation@8625221 (post-#272,
glossary v0.3.0 + 18-rule set), model claude-sonnet-5, source
lecture-python-programming@81d9734 (carries the #604 source-side fixes),
init --localize none. Machine gates: headings 17/17 identical, zero
transliterations, below-deixis and calque signatures clean; the one
pinned-term FAIL is the documented returns verb-homograph false
positive, see QuantEcon/action-translation#240.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: mmcky