fix: Revert - fix(session): Always have calling session be the parent session when making scoped session

[schloerke]

This reverts commit 14b92d4 via #1923

From conversations with @jcheng5 , the proxy sessions should have a single "parent" object which is "Root" session, they should not recurse up the session family tree during calls.

In a followup PR, I'll rename ._parent to ._root_session to avoid confusion.

From chat w/ @jcheng5

If there are reasons we want nested session scopes to actually be related (and there are reasons we might--like we could add .destroy() methods that recursively kill their child scopes), we can do that, but we’d have to make further changes I think.

Off the top of my head, we’d have to make sure that make_scope:

1. Always returns the same object when make_scope is passed with the same id, much like Python does with loaded modules. We’d need to do this with weakrefs.
2. If make_scope is passed with an id more than one level deep, we’d need to create/fetch a separate session proxy object for each level.

[Copilot]

Pull Request Overview

This PR reverts a previous change to how scoped sessions are created so that the calling session is always used as the parent session. Key changes include:

• Reverting the use of SessionProxy in favor of delegating the make_scope call to the parent session.
• Updating the CHANGELOG to remove the entry for the previous behavior.
• Removing a test skip that previously disabled recursive session tests.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
shiny/session/_session.py	Reverts make_scope to call parent's make_scope method
CHANGELOG.md	Removes outdated changelog entry for the reverted fix
tests/playwright/shiny/bookmark/modules/test_bookmark_modules.py	Removes skip for recursive test

Comments suppressed due to low confidence (2)

shiny/session/_session.py:1237

• Verify that deferring make_scope entirely to the parent session does not bypass necessary logic from the previously used SessionProxy.

return self._parent.make_scope(self.ns(id))

tests/playwright/shiny/bookmark/modules/test_bookmark_modules.py:28

• Ensure that the removal of the recursive test skip is intentional and that recursive session behavior is now correctly handled to avoid potential test failures.

if "recursive" in app_name:

[jcheng5]

LGTM if @wch approves

[schloerke]

Approval received via chat:

In a followup PR, I'll rename ._parent to ._root_session to avoid confusion.

@wch: That is a better name 👍

Merging