feat: Implement transformation conveyor

[wwoytenko]

We suspect that Greenmask's performance could be improved by implementing a transformation conveyor. The idea is to:

• Run conveyor workers equal to the number of applied transformations.
• Receive a record with a count matching the number of transformers.
• Send the record to a channel.
• Allow the next record into the channel based on the "head" length. For instance, if we have 3 conveyors and the last one is still processing, ensure that at least 2 records are pushed.

Note: This is a rough algorithm and may be adjusted during development.