985de0b6ad
T11: site-b-2 drops OTOPCUA_ROLES entirely — Cluster:Roles is its sole role source, the rig's only node that can exhibit the two-role-authority split (01/S-12). Expected to fail every deploy on a pre-R3-04 build. T12: site-a-2 pins Cluster__Roles__0="Driver" (capital D) as the standing 01/C-9 case-mismatch pin, keeping cluster-SITE-A verbatim. Pre-fix this un-elects the SITE-A Primary. Combined into one commit (deviation from the plan's two separate T11/T12 commits): the header comment block documenting all six nodes' role sources interleaves both nodes on adjacent lines, so a clean split was not practical. Recorded in the plan's Execution notes. Compose edits only — the rig is NOT brought up as part of this change.