Replace the deprecated <nats.h> include with <nats/nats.h> in the streamer request/reply service implementation to avoid the cnats deprecation warning during builds.
Introduce a dedicated streamer-side recording control plane instead of sharing the producer recorder API.
- register streamer-owned recorder endpoints as a NATS micro service
- add explicit MP4 and MCAP recorder control protobufs and subject helpers
- wire recorder lifecycle handling into the pipeline runtime
- add MP4 writer and depth-alignment support files used by the new recording flow
crosstyan