When intention_dedup_enabled is off, no intention dedup should run, but
the writer's batch dedup still dropped near-duplicate intentions from
one extraction. Gate it on the same switch. Its threshold stays on
MEMORY_DEDUP_THRESHOLD.
Also skip the embedding backfill when dedup is off, since only dedup
uses it, and fall back to the env default on an invalid configured
threshold so a bad value cannot fail the read.
Refs #241
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
alvinfeiandClaude Opus 5.5
ef5ff06590