Downloaded missing ONNX Runtime CUDA provider sidecars when the compiled tiny-model side runtime is used with PI_TINY_DEVICE=cuda.
Preserved actionable CUDA worker diagnostics in tiny-models text output and added focused regression coverage.
Fixes#4475
resolveModels("all") expanded the full TINY_LOCAL_MODELS registry, which now
includes the qwen3-1.7b entry marked unsupportedReason. loadPipeline() throws
for such specs, so the download worker reported it as failed and the bulk
command exited with "One or more tiny title models failed to download" even
when every usable model downloaded. Filter unsupported specs out of the `all`
prefetch path; explicit single-model requests are unchanged. Addresses the
unaddressed Codex P2 on PR #3133.
roboomp