Comment editing: Backend

[gibbsmaya]

Backend task for #945: comment API backend extended to handle tracking last updated

• Comment list API includes last edited date
• Comment editing API includes last edited in response data on successful edit
• Confirm comment editing API limited to author
• QA criteria satisfied

QA criteria
Dev:

• checked that this feature works across all agreed supported browsers and devices.
• checked that this code meets the agreed accessibility level.
• checked that this code meets the agreed browser performance levels.
• checked that this code conforms to the project coding standards.
• had code reviewed by another developer and resolved any issues raised.
• tested this feature as an end user.
• checked that the feature works on the server/s I am deploying it to.

QA:

• tested this feature as a front end user and it meets the acceptance criteria/conforms to the specification and design.
• checked that the feature works on the server/s deployed to

[todd-dembrey]

Testing:

You can access the API on the dev environment, you will need to be logged in:

List of comments for a submission: https://dev-apply.opentech.fund/apply/api/submissions/10/comments/ where 10 is the id of the submission with comments.
You can also use the form at the bottom of the page to create a new comment.

Editing comments:
https://dev-apply.opentech.fund/apply/api/comments/296/edit/ where 296 is the comment you wish to edit. You can only edit your own comments, and can only edit a content once. After you have edited the comment it should remain in the same position in the list view, but with the extra edited field data.

[abigail-hampson]

Good to be deployed to the test server

[abigail-hampson]

This can be tested on #945, with the frontend and backend together