feat: add remote channels and richer notes

src/main/channels/sqlite-channel-state.ts

@@ -0,0 +1,45 @@
+import type { AssistantDatabase } from '../assistant/assistant-database'
+import type {
+  DedupStore,
+  Outbox,
+  OutboxEntry
+} from './channel-driver'
+import type { ChannelResultMessage } from '../../shared/channel-contracts'
+
+export class SqliteChannelDedupStore implements DedupStore {
+  constructor(private readonly database: AssistantDatabase) {}
+
+  claim(channel: string, eventId: string): boolean {
+    return this.database.claimChannelEvent(channel, eventId)
+  }
+
+  release(channel: string, eventId: string): void {
+    this.database.releaseChannelEvent(channel, eventId)
+  }
+}
+
+export class SqliteChannelOutbox implements Outbox {
+  constructor(private readonly database: AssistantDatabase) {}
+
+  enqueue(message: ChannelResultMessage): OutboxEntry {
+    return this.database.enqueueChannelResult(message)
+  }
+
+  markDelivered(id: string): void {
+    this.database.markChannelResult(id, 'delivered')
+  }
+
+  markFailed(id: string): void {
+    this.database.markChannelResult(id, 'failed')
+  }
+
+  listUndelivered(
+    channel?: string,
+    limit?: number
+  ): readonly OutboxEntry[] {
+    return this.database.listUndeliveredChannelResults(
+      channel,
+      limit
+    )
+  }
+}