adr: add ADR-0043/0044 (eval harnesses); reconcile ADR-0024/0032 for SIP w/h

Document the allreduce + GEMM evaluation harnesses and bring the affected
allreduce ADRs in line with the refactored code.

New (Accepted, EN + KO):
- ADR-0043 — allreduce evaluation harness (tests/sccl/): distributed-driven
  correctness, latency/buffer-kind sweeps, sessionfinish plot aggregators,
  topology + FSIM-comparison figures. Verified against the implementation.
- ADR-0044 — GEMM evaluation harness (scripts/gemm_sweep.py + tests/gemm/):
  heavy-script data gen vs. fast test-rendered figures, slow regenerator,
  the 3-figure set. Records two limitations as open questions: the
  theoretical-model constants are inherited (not yet traced to ADR-0033/
  0014), and the *_measured figure is a naming misnomer.

Updated (EN + KO):
- ADR-0024 — add D5: SIP grid w/h resolution (explicit sips.w/h, square
  fallback, fail-loud), documenting the AhbmCCLBackend fix.
- ADR-0032 — D4/D5/Non-goals reconciled: rectangular SIP grids (e.g. 6 SIPs
  as 3x2) are supported via explicit w/h; the square requirement now
  applies only to the fallback. Affected-files repointed to tests/sccl/.

Verification: ADR-0023 and ADR-0042 confirmed still matching the code (no
change). verify_adr_lang_pairs.py passes (EN/KO Status blocks byte-equal).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/adr/ADR-0032-algo-intercube-allreduce.md

@@ -138,20 +138,24 @@ system:
 ```
 
 - `ring_1d`: n_sips-1 rounds of `send global_E / recv global_W`.
-- `torus_2d`: sqrt(n_sips)×sqrt(n_sips) wrapping mesh. Row ring on
-  `global_E/W` then col ring on `global_S/N`.
-- `mesh_2d_no_wrap`: square mesh without wrap-around. Chain reduce +
+- `torus_2d`: `w × h` wrapping mesh. Row ring on `global_E/W` then col
+  ring on `global_S/N`.
+- `mesh_2d_no_wrap`: `w × h` mesh without wrap-around. Chain reduce +
   broadcast per dimension.
 
-2D variants require `n_sips` to be a perfect square.
+2D grid dims `(w, h)` come from `system.sips.w/h` (ADR-0024 D5). A square
+fallback (`round(sqrt(n_sips))²`) applies **only** when `w/h` are omitted,
+so rectangular grids (e.g. 6 SIPs as `3×2`) are supported by giving
+explicit `w/h`.
 
 ### D5. Process-group integration — `AhbmCCLBackend`
 
 At `init_process_group` time the backend:
 
 1. Loads `ccl.yaml` + `topology.yaml`.
-2. Derives `sip_topo_kind, sip_topo_w, sip_topo_h` from
-   `system.sips.topology` using the algorithm module's `TOPO_NAME_TO_KIND`.
+2. Derives `sip_topo_kind` from `system.sips.topology` via the algorithm
+   module's `TOPO_NAME_TO_KIND`, and `sip_topo_w, sip_topo_h` from
+   `system.sips.w/h` with a square-only fallback (ADR-0024 D5).
 3. Calls `configure_sfr_intercube_multisip(engine, spec, cfg)` — one-time
    SFR wiring, mirrors NCCL communicator creation.
 
@@ -222,8 +226,10 @@ Modules loaded via `cfg["module"]` must export:
 
 - **Per-PE allreduce** (intra-cube PE-to-PE reduce). Out of scope — the
   workload for this algorithm is per-cube DP.
-- **Asymmetric SIP topologies** (non-square mesh/torus). `torus_2d` and
-  `mesh_2d_no_wrap` require `n_sips = k²`.
+- **Square-grid fallback requires `n_sips = k²`**: rectangular SIP grids
+  (non-square mesh/torus) are supported, but only when `system.sips.w/h`
+  are given explicitly (ADR-0024 D5). With `w/h` omitted, 2D topologies
+  fall back to a square grid and still require `n_sips = k²`.
 - **Pipelined chunks**: single-tile per cube, no pipelining yet.
 - **Root cube runtime election**: the kernel currently uses
   `root_cube = (mesh_h // 2) * mesh_w + (mesh_w // 2)` — the geometric
@@ -270,7 +276,6 @@ Modules loaded via `cfg["module"]` must export:
 | `ccl.yaml` | Single `lrab_hierarchical_allreduce` entry |
 | `topology.yaml` | Added `system.sips.topology` |
 | `benches/ccl_allreduce.py` | Row-wise cube-mesh tensor layout |
-| `tests/test_allreduce_multidevice.py` (new) | Config-driven ring/torus/mesh |
-| `tests/test_distributed_lrab_hierarchical_allreduce.py` (new) | Full `dist.all_reduce` path |
-| `tests/test_intercube_sfr_config.py` (new) | SFR wiring verification |
+| `tests/sccl/` (test package) | Config-driven ring/torus/mesh correctness + full `dist.all_reduce` path + latency/buffer-kind sweeps (evaluation harness — ADR-0043) |
+| `tests/test_intercube_sfr_config.py` | SFR wiring verification |
 | Removed | `ring_allreduce.py`, `mesh_allreduce.py`, `tree_allreduce.py`, `hierarchical_allreduce.py`, `hello_send.py`, `testing.py` and their tests |