MidnightNameplates 0.11.4.7
Emergency FPS / CVar Rollback

CRITICAL ARCHITECTURE CHANGE
- MidnightNameplates NO LONGER writes Blizzard pet/minion/guardian/totem
  nameplate source CVars.
- No summon CVar writes on login.
- No summon CVar writes on /reload.
- No summon CVar writes from SettingsChanged.
- No CVAR_UPDATE handling.
- ApplySummonedUnitCVars / RestoreSummonedUnitCVars are intentional no-ops.

STABLE RULE
Blizzard decides which nameplate units exist.
MidnightNameplates only skins nameplate# units Blizzard provides.

SUMMONS UI
- Removed misleading automatic source-management controls.
- Added clear stability notice:
  users must enable Blizzard's Minions nameplate source manually if they
  want pet/minion plates exposed to addons.
- Midnight still applies its own summon visibility/style after the source exists.

IMPORTANT
Stacking.lua still writes nameplateMotion/nameplateOverlap CVars.
Those are layout CVars and are unrelated to the summon-source freeze issue.

TEST
1. Install 11.4.7 and /reload.
2. WoW must NOT hang or show huge FPS spikes after login/reload.
3. Leave Blizzard Minions OFF:
   Bruufenn has no Midnight plate. This is expected.
4. Manually enable Blizzard Options -> Nameplates -> Minions.
   Expected: no freeze / no severe FPS spike caused by Midnight fighting the setting.
5. Once Blizzard exposes the pet plate, Midnight should skin Bruufenn.
6. Toggle Friendly Pet / Minion inside MNP.
   It should only show/hide Midnight rendering; it must not change Blizzard CVars.
7. /mnpsummon remains available as a read-only diagnostic.
8. No Lua / taint / ADDON_ACTION_BLOCKED / secret-value errors.

THIS PHASE PRIORITIZES STABILITY OVER AUTOMATION.
