[havok2-htwo]

[Engine] native_dense: STRATA_HC_Q8 uploads only the stage's own Q8_0 rows on a trimmed layer split

Problem

With --trim-stage-weights and STRATA_HC_Q8=1, the loop that attaches the GGUF's Q8_0 hyper-connection rows does not skip other stages' layers. Each trimmed card uploads all 48 layers' rows and reads only its own. Observed: 0.63 GiB per card with UD-IQ4_XS.

Change

src/core/native_dense.cpp, +2 lines: the loop skips a tensor when outside(name) || !in_range(name), the filter the upload loop above it already uses. No value changes; without stage trim in_range passes every layer, so nothing changes.

Validation

• Revision: v0.2.0-beta 3d1fb480 plus this commit (023b3962), CUDA sm_86 build with setup-style flags, 4x RTX 3090 24 GB.
• Rig: Qwen3.8-Flash-Next UD-IQ4_XS native GGUF, --layer-split 12,25,37 --trim-stage-weights, STRATA_HC_Q8=1, 16 slots, greedy.
• Per-card STRATA_HC_Q8=1: ... GiB line: stock 0.63 / 0.63 / 0.63 / 0.63; with this change 0.16 / 0.18 / 0.16 / 0.15.
• Tokens (tools/batch_test.py --batch 16 --n 16 --max-new 128, same expert cache on every card): solo 16/16 and batch 16/16 identical between stock and this change.
• Without trim, 0.63 GiB per card with and without the change, as expected.

Not tested

HIP, Metal and SYCL builds (this file is compiled there, but not built here), 2- and 3-GPU splits, --layer-split auto, long prompts, other models.