Adds likes on comments, as the comment_likes table and a like_count on
each comment that comment-like-service keeps in step, so that listing
comments doesn't count their likes.
f
up(db: DatabaseSync): void
Run once by runMigrations. Existing comments start with no likes, and a
database made from schema.sql already has both.
Usage
import * as mod from "api/db/migrations/0001_comment_likes.ts";