closes https://github.com/TryGhost/Team/issues/1684
**Migrations:**
- Added report permissions (fixtures + migrations)
- Dropped reason field in reports (no textarea in reports in V1)
- Dropped nullable from comment_likes.member_id (can't be null)
- Added SET NULL/CASCADE foreign keys for comments related tables(*)
(*):
fixes https://github.com/TryGhost/Team/issues/1687
refs https://ghost.slack.com/archives/C02G9E68C/p1658217288591369
This commit adds support for `SET NULL` foreign keys in schema and migration helpers + also fixes the foreign keys for the comment_reports, comment_likes and comments tables.
- When a member is deleted, we **do** want to keep their reports (SET NULL)
- When a member is deleted, we **do not** want to keep their likes (CASCADE)
- When a member is deleted, we **do** want to keep the comments (SET NULL)
**Changes:**
- Added report API: `POST /members/api/comments/{id}}/report/`
- Sends an email to the owner when a comment is reported
- Saves a report to the database (not used for now, but might be useful later)
refs https://github.com/TryGhost/Toolbox/issues/354
- this commit turns the Ghost repo into a monorepo so we can bring our
internal packages back in, which makes life easier when working on
Ghost
