Function acquireForkEdgeLock

apps/sim/lib/workspaces/fork/lineage/lineage.ts:91–95

(tx: DbOrTx, childWorkspaceId: string)

 * unnecessary serialization, never a correctness issue.
 */
export async function acquireForkEdgeLock(tx: DbOrTx, childWorkspaceId: string): Promise<void> {
  await tx.execute(
    sql`select pg_advisory_xact_lock(hashtextextended(${`fork-edge:${childWorkspaceId}`}, 0))`
  )
}

/**
 * Serialize every promote/rollback whose TARGET is this workspace. Sibling forks