0.7.20 — Concurrent stream startup + third-stream metadata (wraps neolink 0.7.18)

0.7.20

Wraps neolink 0.7.18. Fixes a dashboard where several camera cards all fail to load at the same time.

• When a dashboard opened several camera streams at the exact same moment (e.g. multiple cards on one view), they could all get stuck with no video — each connected, then received nothing and timed out. The add-on now handles simultaneous stream starts concurrently, so they all come up. Opening cameras one at a time was never affected.
• The third ("Balanced" / extern) stream now reports its correct resolution, frame rate and bitrate — including on camera units that don't advertise it in their config (the add-on reads it from the video itself, the way the official Reolink app does). It's the H.264 "Balanced" live quality, reachable at …/<camera-name>/externStream (set the camera's Stream option to Extern or All).

No add-on configuration changes are required.