Fix RTSP frame timestamps and harden runtime bundle rollout

[joeblack2k]

Summary

• use the encoder-provided frame timestamp for emitted H264 NAL units
• derive per-frame duration from the configured FPS when emitting video frames
• add runtime bundle packaging/install helpers and validate that the new prudynt bundle is actually live after restart

Validation

• validated on a Thingino T31 camera streaming 2304x1296@30fps
• direct RTSP probe no longer showed non-monotonic DTS warnings in the validation window
• go2rtc / Frigate ingest stabilized after switching the camera to the patched runtime bundle

Notes

• the runtime install helper explicitly handles the case where the init script stops the wrapper but misses the already-exec'd prudynt.real process
• keeping this as draft until maintainer review decides whether the helper scripts belong upstream as-is