Use canonical host chains for automation scripts

extensions/automations/chain.ts

@@ -1,11 +0,0 @@
-/** Script credentials follow the creator's ownership, fork, and branch ancestry, in T44 order. */
-import { defineDoc } from '@earendil-works/pi-durable'
-import { BACKGROUND_CONTEXT as context } from '@earendil-works/chord/context'
-const Started = defineDoc<{by?:number}>({kind:'board.started',version:1,scope:'conversation',history:'latest',fork:'initial',checkpointWhen:()=>false,initial:()=>({})})
-export async function executionChain(host: any, creator?: number): Promise<string[]> {
-  if (creator === undefined) return []
-  const record = await host.harness().commit((tx: any) => tx.conversation(creator), context)
-  const up = record?.owner?.conversationId ?? record?.parent?.conversationId ??
-    (await host.harness().snapshot(Started, creator, context))?.by
-  return [String(creator), ...await executionChain(host, up)]
-}