b10373

speculative: never-worse scheduler - verify-all cold start, robust fits

Field regression on a 5090 (coding 600 -> 350-400 t/s) exposed three
defects in the self-calibrating scheduler:

• cold sessions ran admission on the head's raw pessimistic
  confidences; worse, the resulting truncation censored the very
  full-block rounds calibration needs, so the first fit was ~6000
  rounds away. Uncalibrated mode now admits everything (same
  convention as sglang's flat-SPS verify-all default): full fixed-depth
  speed from round one, and every round feeds calibration, putting the
  first fit ~1 long prompt away.
• early small-window fits produced extreme temperatures (T=0.087 seen,
  crushing deep-position survival). Fits now require >=32 samples of
  each outcome class per position (identity otherwise) and shrink
  geometrically toward identity by window size.
• the admission scan now demands a meaningful predicted gain before
  truncating (4% margin on the causal early stop, and full admission
  is preferred whenever it scores within the margin of an interior
  argmax): near-flat theta curves - easy content on fast GPUs - admit
  everything, encoding the measured lesson that trading accepted
  tokens for noise-level predicted savings always loses.

Also: profiled SPS curve forced monotone (Windows timing outliers put
size 1 above size 2), and the calibration cache version bumped to v2
so existing caches from the noisy-fit era are discarded on load.

Isolation on RTX PRO 6000 (GSM k8, fresh caches, 4 rounds): OFF 588
t/s mean vs sched+adapt 587 (parity, accept len 7.18 vs 7.08); cold
first round 600.6 (was 350-400 on the affected 5090 setup).

Website:

• https://llama.app

macOS/iOS:

• macOS Apple Silicon (arm64)
• macOS Apple Silicon (arm64, KleidiAI enabled) DISABLED
• macOS Intel (x64)
• iOS XCFramework

Linux:

• Ubuntu x64 (CPU)
• Ubuntu arm64 (CPU)
• Ubuntu s390x (CPU)
• Ubuntu x64 (Vulkan)
• Ubuntu arm64 (Vulkan)
• Ubuntu x64 (ROCm 7.2)
• Ubuntu x64 (OpenVINO)
• Ubuntu x64 (SYCL FP32)
• Ubuntu x64 (SYCL FP16)

Android:

• Android arm64 (CPU)

Windows:

• Windows x64 (CPU)
• Windows arm64 (CPU)
• Windows arm64 (OpenCL Adreno)
• Windows x64 (CUDA 12) - CUDA 12.4 DLLs
• Windows x64 (CUDA 13) - CUDA 13.3 DLLs
• Windows x64 (Vulkan)
• Windows x64 (OpenVINO)
• Windows x64 (SYCL)
• Windows x64 (HIP)

openEuler:

• DISABLED
• openEuler x86 (310p)
• openEuler x86 (910b, ACL Graph)
• openEuler aarch64 (310p)
• openEuler aarch64 (910b, ACL Graph)

UI:

• UI