Fix worktree trust not applied on window reuse (#46623)

New workspace/window creates a different `WeakEntity<WorktreeStore>` for
the same path, which was not considered before.

Closes https://github.com/zed-industries/zed/issues/46318

Release Notes:

- Fixed worktree trust not applied in window reuse
bf3cab6ae6Kirill Bulatov committed on 1/12/2026, 3:05:48 PM· committed by GitHubparentcbb6e2f
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