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>

docs/adr/ADR-0005-diagram-views-distance-layout.md

@@ -82,9 +82,8 @@ Explain cube-internal structure and data/control flow.
 
 **Visible elements**
 
-- XBAR (top/bottom): HBM pseudo-channel crossbar
-- Bridge (left/right): cross-half HBM connectors between XBAR.top and XBAR.bottom
-- NOC: distributed on-die fabric for non-HBM traffic
+- Router mesh: 2D grid of NOC routers (from cube_mesh.yaml), all traffic routes through mesh
+- HBM_CTRL attached to PE routers (local HBM = 0 hop)
 - HBM subsystem (HBM_CTRL)
 - Shared SRAM: cube-level shared memory
 - Management CPU (M_CPU)
@@ -97,14 +96,13 @@ Explain cube-internal structure and data/control flow.
 
 **Visible links**
 
-- PE → XBAR (HBM data path, top or bottom by corner placement)
-- PE → NOC (non-HBM data path)
-- XBAR ↔ bridge ↔ XBAR (cross-half HBM access)
-- XBAR → HBM_CTRL
-- NOC ↔ UCIe endpoints
-- NOC ↔ shared SRAM
-- M_CPU ↔ NOC (command path)
-- NOC → PE_CPU (command delivery, collapsed into PE block)
+- PE → router (HBM + non-HBM data path via mesh)
+- Router ↔ HBM_CTRL (local HBM access)
+- Router ↔ Router (mesh hops for remote access)
+- Router ↔ UCIe endpoints
+- Router ↔ shared SRAM
+- M_CPU ↔ router (command path)
+- Router → PE_CPU (command delivery, collapsed into PE block)
 
 ---