feat(id): brand SessionID through Drizzle and Zod schemas (#16953)

packages/opencode/test/tool/external-directory.test.ts

@@ -4,9 +4,10 @@ import type { Tool } from "../../src/tool/tool"
 import { Instance } from "../../src/project/instance"
 import { assertExternalDirectory } from "../../src/tool/external-directory"
 import type { PermissionNext } from "../../src/permission/next"
+import { SessionID } from "../../src/session/schema"
 
 const baseCtx: Omit<Tool.Context, "ask"> = {
-  sessionID: "test",
+  sessionID: SessionID.make("ses_test"),
   messageID: "",
   callID: "",
   agent: "build",