Blanket exemption: skip glossary enforcement for every term on this
key ("glossary_exempt": true). Prefer glossaryExemptTerms — a
blanket exemption also waives the terms the key should still honor, and
it tells a reviewer nothing about what was waived.
Required by convention for source ARBs: which logical group this key
belongs to (e.g. checkout, common, settings). Drives the
per-platform namespaces: filter on dialect sync. Absent on
translation ARBs — the CLI strips metadata from translations.
Whether this key is excused from enforcing term — by a blanket
exemption or by naming it. Term matching is case-insensitive, since
the glossary's canonical lemma may be capitalized differently from the
exemption a human typed.