docs(arrow): hash index auto-enables via primary_key/indexes, not hash_index: enabled The Arrow accelerator no longer activates its hash index from a hash_index: enabled param. As of v2.0.0 (spiceai/spiceai#10749), the param is stripped and ignored (a warning is logged), and indexing auto-enables only when primary_key or indexes is configured. The canonical hash-index feature page was corrected in #1730 but the Arrow accelerator pages and the performance-tuning reference still instructed users to set hash_index: enabled. Scoped to vNext + version-2.0.x only; the behavior changed in v2.0.0, so v1.11.x and earlier correctly document the legacy activation mechanism.

docs(arrow): hash index auto-enables via primary_key/indexes, not hash_index: enabled The Arrow accelerator no longer activates its hash index from a hash_index: enabled param. As of v2.0.0 (spiceai/spiceai#10749), the param is stripped and ignored (a warning is logged), and indexing auto-enables only when primary_key or indexes is configured. The canonical hash-index feature page was corrected in #1730 but the Arrow accelerator pages and the performance-tuning reference still instructed users to set hash_index: enabled. Scoped to vNext + version-2.0.x only; the behavior changed in v2.0.0, so v1.11.x and earlier correctly document the legacy activation mechanism.