Per-app cutover steps mapped to the library surface; flags 5 findings that
change the plan (OtOpcUa section is Security:Ldap not Authentication:Ldap;
singleton 'bug' already mitigated; ScadaBridge inbound API keys are a
re-architecture not a reformat; OtOpcUa config+DB mapping + DevStubMode +
2nd LDAP consumer; MxGateway ApiKeys is the low-risk donor path).