298ad04fba
IWritable shipped behind write.enabled and docs/drivers/MTConnect.md told the operator to set it, but MTConnectDriverForm — the only editor DriverFormMaps maps for this type, with no raw-JSON escape hatch and no driver-instance API — exposed no write section, so the documented enablement path was a hand edit of DriverInstance.DriverConfig in the config DB. - Write-back section: switch + form text stating it is observation injection, that the Agent's AllowPut is an independent second gate, and that it does not by itself make a node writable over OPC UA (Tag.AccessLevel still composes CurrentWrite). - Write added to the mirrored MTConnectConfigDto and to the form model, written in BOTH states — an omitted block would leave a previously-authored true standing, so the switch could never turn writing off again. - The false 'MTConnect is read-only' header comment is gone; the doc names the new section. No bUnit here, so the model/serialization seam is unit-tested both sides: the AdminUI test pins the emitted bytes, and MTConnectFactoryTests parses that same document and asserts MTConnectDriverOptions.Write.Enabled. Live page verification remains a rig step.