feat: add standalone server topology view

bible-local/04-data-models.md

@@ -58,6 +58,17 @@ Required rules:
 3. UI/export mismatches are bugs, not accepted divergence
 4. New shared device fields belong in `HardwareDevice` first
 
+### NUMA affinity
+
+NUMA affinity is nullable throughout the internal and Reanimator export path.
+In Go it is represented as `*int`: `nil` means not reported / not applicable,
+while a pointer to `0` means the real NUMA node 0. Numeric zero must never be
+used as an absence sentinel.
+
+Topology relationships outside the Reanimator ingest contract live in the
+separate versioned `topology.json` document and are not added to
+`reanimator.json`.
+
 Deduplication priority:
 
 | Priority | Key |