chore(deps): yarn dedupe (collapse redundant duplicate copies)

Runs Yarn's native dedupe (highest strategy) over the lockfile, merging
243 same-major duplicate ranges introduced by the v9/cluster changes —
removes ~190 redundant package copies (419 -> 347 multi-version packages).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: rhyslbw