llama.cpp update adds guard against tensor size overflow

The llama.cpp library released a patch on Sep 30, 2026, that blocks tensors whose size would overflow during padding. The change checks the raw size plus alignment before adding padding, rejecting unsafe tensors early. A new test case shows the fix catches a 2⁶⁴‑16‑byte tensor that previously slipped through. The update applies to all supported builds, from macOS to Windows and Linux, including CUDA and Vulkan versions.