pub fn resolve_gqa_pack(declared: bool, env_raw: Option<&str>) -> bool
2026-09-25: declared, overridden by a parseable METRALE_ATTN_DECODE_GQA_PACK value. Pure; gqa_pack_enabled supplies the environment.
declared
METRALE_ATTN_DECODE_GQA_PACK
gqa_pack_enabled