Unable to find my previous copilot CLI sessions consistently.

### Describe the bug

The one and very big frustration that I have with copilot CLI recently is not being able to resume my session that I just worked in the previous day.

For some reason when I use the `/resume`, `--resume` flag it shows many sessions but not all, the ones that I just worked yesterday don't show up.

I have to know ahead of time where was the cwd from that session (which is almost impossible given the new worktree feature, generating random branch / directory names, which normally is the cwd for the session.

Please allow the /resume local session having a `global local` option I don't have to care where that session started or what was last CWD.

### Affected version

v1.0.65

### Steps to reproduce the behavior

1. Start a session in a folder A
2. Generate the worktree (folder B)
3. Move the CWD to the new worktree (folder A -> folder B)
4. Do stuff.
5. Close copilot
6. Open copilot in folder A
7. Try to resume the session, it may not list there.

---

Check your .copilot\session-state\session-ids (order by the most recent created)

1. Open copilot in any folder
2. Open resume option
3. The local sessions list doesn't reflect the actual local sessions in the `.copilot` folder

### Expected behavior

copilot\session-state\session-ids should transparently be reflected by the /resume (local sessions)

### Additional context

_No response_

Start by reproducing the listed folder and worktree steps, then inspect `.copilot/session-state/session-ids` and compare its most recently created sessions with the `/resume` local sessions list. Done means sessions stored there are transparently reflected when Copilot is opened from the original folder.

Scritto dal modello di indicizzazione a partire dal testo della issue.