Develop decoder + encoder for trickle segment processing

[eliteprox]

Building upon the trickle implementation in byoc_server.py, implement a decoder + encoder workflow similar to ai-runner's live/trickle/decoder.py and encoder.py. Ensure frames are being processed by the ComfyStream pipeline.

The following PR may be useful for processing segments, but might require changes to accommodate trickle vs webrtc segments

[linear]

COMFY-120 Develop decoder + encoder for trickle segment process

[eliteprox]

Trickle has been integrated into comfystream here #289 with stream/start /stream/stop endpoints. The trickle subscribe/publish API is integrated to leverage the existing comfystream pipeline used by RTC streams.

This milestone unlocks several new important use cases

[eliteprox]

The solution also leverages a re-usable python package I developed called py-trickle, which provides a TrickleClient, Publisher, Subscriber, Decoder and Encoder. py-trickle includes all the necessary type definitions for building multimedia data streams that are compatible with go-livepeer, including video, audio and text.

[eliteprox]

This work has been completed via pytrickle https://github.com/livepeer/pytrickle and implemented using #289