vulkan: Relax VRAM allocation limits for better stability

Adjusts VRAM allocation strategy to be more conservative while maintaining
performance:

- Increases reserve memory from 1/8th to 1/4th (max 2GB) for discrete GPUs
- Increases base memory limit from 6GB to 8GB
- Doubles resolution scaling memory from 1GB to 2GB per scale factor
- Reduces system memory reservation from 8GB to 4GB for integrated GPUs
- Increases maximum memory limit from 4GB to 6GB for integrated GPUs

These changes help prevent memory leaks while still providing adequate
VRAM for optimal performance.

0 files changed, 0 insertions, 0 deletions