refactor(core): move database schema ownership (#29068)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

packages/opencode/test/agent/plugin-agent-regression.test.ts

@@ -5,7 +5,7 @@ import { FetchHttpClient } from "effect/unstable/http"
 import path from "path"
 import { pathToFileURL } from "url"
 import { Agent } from "../../src/agent/agent"
-import { Bus } from "../../src/bus"
+import { EventV2Bridge } from "../../src/event-v2-bridge"
 import { Config } from "../../src/config/config"
 import { Env } from "../../src/env"
 import { RuntimeFlags } from "../../src/effect/runtime-flags"
@@ -33,7 +33,7 @@ const configLayer = Config.layer.pipe(
   Layer.provide(FetchHttpClient.layer),
 )
 const pluginLayer = Plugin.layer.pipe(
-  Layer.provide(Bus.layer),
+  Layer.provide(EventV2Bridge.defaultLayer),
   Layer.provide(configLayer),
   Layer.provide(RuntimeFlags.layer({ disableDefaultPlugins: true })),
 )