[BUG] `forget()` silently continues after state check failure

[cachebag]

Describe the bug
During forget() operation, if getting device state fails in the wait loop, the error is logged but the loop just breaks and continues to the deletion phase. This means we proceed without confirming the device actually disconnected.

Err(e) => {
    warn!("Failed to get device state in wait loop {i}: {e}");
    break;  // Continues to line 167 (deletion phase)
}

If the D-Bus call fails, we don't know if the device disconnected or is still connected.

Expected behavior
Should return the error or verify final state before proceeding to delete saved connections.