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-0025-ipcq-direction-addressing.md

@@ -89,7 +89,14 @@ direction_idx × bytes_per_direction). 따라서:
 `src/kernbench/ccl/install.py`:
 
 ```python
-_OPPOSITE_DIR = {"E": "W", "W": "E", "N": "S", "S": "N"}
+# Extended in ADR-0032 with global_* pairs for inter-SIP directions,
+# which were introduced by configure_sfr_intercube_multisip to keep
+# intercube (N/S/E/W) and inter-SIP (global_N/S/E/W) namespaces disjoint.
+_OPPOSITE_DIR = {
+    "E": "W", "W": "E", "N": "S", "S": "N",
+    "global_E": "global_W", "global_W": "global_E",
+    "global_N": "global_S", "global_S": "global_N",
+}
 
 def reverse_direction(my_rank: int, peer_rank: int, my_dir: str) -> str | None:
     """Find peer's direction that reciprocates my_dir→peer_rank.