ADR-0032 + intra_* opposite directions in IPCQ install

Add intra_N/S/E/W to install.py _OPPOSITE_DIR table so the intra-cube
PE-to-PE namespace is symmetrical with intercube N/S/E/W. ADR-0032
documents the intercube allreduce algorithm (supersedes ADR-0029).
Refresh ADR-0024/0025/0029 cross-refs and update
test_intercube_sfr_config.py to cover the new intra_* mappings. Drop
the obsolete test_ccl_round_robin_recv.py (replaced by intercube tests).

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

docs/adr/ADR-0024-sip-tp-launcher.md

@@ -2,7 +2,14 @@
 
 ## Status
 
-Proposed (Revision 8 — Hierarchical content split out to ADR-0029)
+Accepted. rank = SIP process-group model stands. The allreduce algorithm
+path (mapper / validator / per-PE install machinery originally targeted at
+ADR-0029) has been replaced by ADR-0032: `AhbmCCLBackend` now calls
+`configure_sfr_intercube_multisip` at `init_process_group` time and the
+intercube kernel receives `(sip_rank, sip_topo_kind, sip_topo_w,
+sip_topo_h)` appended after the module's `kernel_args()`. The
+`leader_only` / `all_pes` mapper concepts in this document are no longer
+used by the default allreduce path.
 
 ## Context