Seed ml translation: numpy (calibration round 4, v0.29.2 engine)

Machine translation of numpy for native-speaker review — round 4 of the
calibration programme. Replaces the v0.29.0 draft (3cac85f), which was made
before the editor's answers on #22 and which he had not started reading.
Produced locally with translate init --localize none at action-translation
v0.29.2 (5f74d74 = @v0), model claude-sonnet-5, from
lecture-python-programming@b0b0b56 (numpy.md unchanged since 1706cea). The
cleanest of three draws by the ml lints (bare endings 1 / 37 / 2).

One mechanical repair by ml_repair.py, disclosed on the PR: a comma between
two -ഉം items (Columns-ഉം, rows-ഉം), per the editor's "always" on #22. No
hand edits. Exercise-family blocks 8/8 byte-identical to source; headings
20/20 and code cells byte-identical.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Author: mmcky