Content attachment tools

Attach and detach existing repo uploads without a separate context lookup.

Tools

attach_file_upload returns attachment metadata plus active upload detail and content links.
detach_file_upload returns a detached status and the upload UUID.

Arguments

Both tools require repo, upload_uuid, and exactly one target shape:

Target	Arguments
Thread	`thread_number`
Reply	`thread_number` and `reply_number`
Pull	`pull_number`
Pull review	`pull_number` and `review_uuid`

Example

{
  "name": "attach_file_upload",
  "arguments": {
    "repo": "teams/acme/webapp",
    "pull_number": 17,
    "review_uuid": "550e8400-...",
    "upload_uuid": "a1b2c3d4-..."
  }
}

get_thread_context and get_pull_context include attachment arrays inline on every supported target.