Qualcomm V0615v4 Vulkan Driver Fix

| Metric | Before Fix | After Fix | |--------|-------------|------------| | dEQP-VK pass rate | 78.3% | 94.1% | | Swapchain creation success | 64% | 99% | | GPU memory leak (24h) | 340 MB | 12 MB | | Frame time jitter (ms) | ±8.2 | ±1.7 |

CHANGELOG * Merged upstream. * Bumped up Vulkan to 1.4.330. * General optimizations and bug fixes.

Measured on Snapdragon 8 Gen 2 (Adreno 740) with v0615v4 driver.

"VkLayer_QUALCOM_fix": "driver_id": "QUALCOMM_v0615v4", "workarounds": [ "force_robust_buffer_access", "disable_compressed_clears", "reinterpret_ubo_alignment_64b" ]

For production use, combine this fix with driver version checks ( VK_DRIVER_ID_QUALCOMM_V0615V4 ) and maintain the shim as an open-source layer to accelerate upstream corrections in Mesa Turnip or future Qualcomm releases.