Expand description
Stable, greppable error codes carried by CodedError. A scheduler / CI step
matches on these (the JSON code field or the [CODE] text prefix) instead
of the human wording, which is free to change. Every code shares the
RIVET_CONFIG_ or RIVET_SOURCE_ prefix; the codes_* guard tests assert
distinctness + the prefix, mirroring the verify-layer RIVET_VERIFY_* guard.