* test(#2641): add regression for mempalace-capture gate default inversion
* fix(#2641): treat absent capture_artifacts as enabled (schema default)
The gate used `capture_artifacts !== true` which treated absent (undefined)
as disabled — inverted from the capability registry's declared default of
true. Changed to `capture_artifacts === false` (disabled only on explicit
false), matching the sibling gsd-mempalace-recall skill's correct pattern.
* chore(#2641): add changeset fragment
* chore(#2641): backfill changeset PR number 2982
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Co-authored-by: sim <sim@local>
4df6d884b3