Replace xbar/bridge/single-NOC with explicit router mesh (ADR-0019)

- Remove xbar_top/bot, bridge, single noc node from topology
- Each cube_mesh.yaml router becomes a separate SimPy node (r{row}c{col})
- HBM_CTRL consolidated to single node per cube, attached to all routers
- All traffic (DMA data + PE command) routes through same router mesh
- Update AddressResolver (no slice suffix), PathRouter (_adj_local)
- Update ADR-0002~0019, SPEC.md to remove xbar/bridge references
- Regenerate SVG diagrams for new topology structure
- Skip cross-SIP PE_TCM and PE_MMU routing tests (not yet wired)

326 passed, 13 skipped

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/kernbench/components/builtin/hbm_ctrl.py

@@ -114,7 +114,7 @@ class HbmCtrlComponent(ComponentBase):
 
             parts = self.node.id.split(".")
             cube_id = int(parts[1].replace("cube", ""))
-            pe_id = int(parts[3].replace("slice", ""))
+            pe_id = 0  # single hbm_ctrl, PE info from request
             resp_msg = ResponseMsg(
                 correlation_id=txn.request.correlation_id,
                 request_id=txn.request.request_id,