feat: persist LinkSub topology references

src/facade/topologyReferences.ts

@@ -1,17 +1,7 @@
-import type { SubshapeRef } from './types'
+import type { SubshapeRef, TopoRefValue } from './types'
 import { matchSubshapes, type SubshapeMatch, type SubshapeSignature } from './topologyNaming'
 
-export type PersistedTopoRef = {
-  schemaVersion: 1
-  objectId: string
-  kind: SubshapeRef['kind']
-  persistentId: string
-  topologyVersion: number
-  generation: number
-  status: NonNullable<SubshapeRef['status']>
-  signature?: string
-  candidates?: string[]
-}
+export type PersistedTopoRef = TopoRefValue
 
 export type TopoRefResolution = {
   status: 'resolved' | 'ambiguous' | 'deleted'