KNOWN_COMPATIBLE_SPEC_VERSIONS

Node runtime specVersions we've validated the bundled ledger against. The node's Substrate runtime version doesn't carry the ledger semver directly, so we gate on specVersion — the monotonic counter the runtime bumps on a ledger-affecting upgrade. Outside this set we WARN (the matrix lags reality), we do not block.

Keep this in sync as new node releases are verified on PreProd/localnet.