The head-amp fields, named as plain strings on purpose.
Exported so the conformance test can assert the allowlist never reaches them. Strings
rather than keyof ChannelSnapshotJson because this set must keep meaning something while
the head-amp fields are being moved off the channel — a guard that stops compiling during
the very migration it guards is no guard at all. RETIRED spellings stay in the list for that
same reason: sensDbu (retired #165), gainDb/gainIsSens (retired 2026-07-30). A file
carrying one must not become pasteable just because the current name moved on.
The head-amp fields, named as plain strings on purpose.
Exported so the conformance test can assert the allowlist never reaches them. Strings rather than
keyof ChannelSnapshotJsonbecause this set must keep meaning something while the head-amp fields are being moved off the channel — a guard that stops compiling during the very migration it guards is no guard at all. RETIRED spellings stay in the list for that same reason:sensDbu(retired #165),gainDb/gainIsSens(retired 2026-07-30). A file carrying one must not become pasteable just because the current name moved on.