Fix turret aiming freeze: server rotation loop never executed in client-authority mode
Server movement logic was incorrectly disabled when _clientAuthority = true, preventing
_worldYaw/_worldPitch lerp, clamping, pivot rotation, and snapshot updates.
Fixed by:
- Making server apply rotation unconditionally in Update()
- Corrected HasServerAuthority to always true for rotation authority
- Clamping turret-space yaw/pitch at SetTargetAngles
- Ensuring server snapshot updates execute consistently
- Client authority now only supplies target angles — server still owns movement
Eliminates turret freezing, desync, and clamping bypass issues.