Distillation

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<observations> Date: Aug 4, 2026 * 🟡 (22:07) Scheduled follow-up executed: rechecked CI status for PR #21336 (workflow run 30954592975). backend typing passed (2m55s, job 92144583288). All 7 backend test shards (0-6) still pending (jobs 92144763239, 92144763286, 92144763303, 92144763440, 92144763419, 92144763234, 92144763267). Run ID updated from 30953194987 → 30954592975 (new CI run triggered by the fix commit). * 🟡 (22:07) Assistant decision: tests still pending — no failures or passes to inspect yet. Waiting and scheduling another follow-up. * 🟡 (22:07) Follow-up scheduled: id unfbzk3k, in 6 minutes. Re-prompt will: check CI status for PR #21336 backend tests via `gh pr checks 21336 | grep -E 'typing|backend test|Backend$'`; verify backend typing passed and check test shards 0-6 against latest run 30954592975