Add support in SqlRunnerStorage and SqlMessageStorage for setting schema

[sdemjanenko]

What is the problem this feature would solve?

I would like to be able to put the cluster tables in their own schema in my PG database.

What is the feature you are proposing to solve the problem?

import { SqlRunnerStorage, SqlMessageStorage } from "@effect/cluster"

// Use a separate schema for cluster tables
const clusterSchema = "cluster_schema"

const runnerStorageLayer = SqlRunnerStorage.layerWith({
  prefix: "cluster",
  schema: clusterSchema  // Tables will be: cluster_schema.cluster_runners, cluster_schema.cluster_locks
})

const messageStorageLayer = SqlMessageStorage.layerWith({
  prefix: "cluster",
  schema: clusterSchema  // Tables will be: cluster_schema.cluster_messages, cluster_schema.cluster_replies
})

What alternatives have you considered?

No response