Comment Metadata

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• Comment Metadata Discussion: We need to list out every type of comment the bot can create, and assign a name to each type. #629
• Comment Metadata Discussion: We also need to define the schema for our embedded comment metadata to be future proofed. #630
• Comment Metadata Discussion: We need to include the comment metadata in all the reads and writes of the comments. #631

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We will need to add comment metadata e.g:

<!-- {type: "conversation rewards", value: 0.023, version: 1} -->

and replace this includes soon.

Originally posted by @pavlovcik in #545 (comment)