[Node] Set requestPermission False If Using Default Permission Handler

[MRayermannMSFT]

Needed for extensions security work. We want to detect if an extension is trying to setup a permission handler.

[Copilot]

Pull request overview

Adjusts Node.js SDK session-resume behavior so extensions that don’t explicitly install a permission handler can be detected by the CLI/security layer, by sending requestPermission: false when the default join-session handler is used.

Changes:

• Introduces a shared defaultJoinSessionPermissionHandler in types.ts for extension session joining.
• Updates joinSession() to use the shared default permission handler instead of a local definition.
• Changes session.resume RPC params to set requestPermission based on whether a real permission handler was provided.

Show a summary per file

File	Description
nodejs/src/types.ts	Adds shared default permission handler used as the sentinel for “no explicit handler.”
nodejs/src/extension.ts	Switches joinSession() to use the shared default handler (removes local handler).
nodejs/src/client.ts	Sets requestPermission to false when the default join-session handler is in use.

Copilot's findings

• Files reviewed: 3/3 changed files
• Comments generated: 2