## Summary
Align `workloads/ops/` file naming and directory structure 1:1 with the
post-#928 `tileops/ops/` layout. Pure file-move/rename refactor — no
workload logic changes.
- Drop `_fwd` suffix from mamba, attention, deltanet, and gated_deltanet
workloads
- Rename `mean_pooling_ops.py` to `mean_pooling.py`
- Move attention workloads into `workloads/ops/attention/` subpackage
- Update all imports across the repo
Closes#931
## Test plan
- [x] **AC-1**: All `from workloads.ops.<name>` imports updated for
moved/renamed files — verified by importing all 20 renamed/moved
workload classes and grep confirming zero old import paths remain
- [x] **AC-2**: `python -c "from workloads.ops.attention import ..."`
resolves for all 15 moved attention workload classes
- [x] **AC-3**: Full test suite passes — 2361 passed, 22 skipped, 0
failed (233.76s at commit 4dc54b7)
- [x] **AC-4**: No orphaned files remain after migration — all 11 old
filenames confirmed absent; `mhc_post.py`, `mhc_pre.py` at
`workloads/ops/` root; `nsa_utils.py` at `workloads/` root
## Follow-up
No follow-up issues or suggestions.
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Co-authored-by: Ibuki 🍃 — a wind born from Claude Opus <Ibuki-wind@users.noreply.github.com>
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