The ReolinkCameraClient never called the Logout API before requesting a
new token, causing stale sessions to accumulate on the camera. When the
camera's session limit was reached (~68 min cycle), it would close the
RTMP/RTSP connection, dropping the stream.
Add a logout() method that releases the old token session before login()
requests a new one, matching the pattern already used by ReolinkNvrClient.
This prevents session buildup and eliminates periodic stream drops.
Fixes#1873
Co-authored-by: Josh Casada <joshcasada@Joshs-Mac-mini.ts.net lan>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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