FLX-2104: trace op field set does not match flux-trace/1

Family: plan/replay binding (the 2000 band)

Each op in KERNEL-SPEC §10 has an exact field set: a missing field leaves the trace ambiguous and an extra one puts something in the golden that the vocabulary never promised -- a wall-clock reading, for example, which would make two identical runs disagree.

Look it up offline

$ fluxsim explain FLX-2104

Every code is listed in the error index.