Add toot source to delete result to ease Delete & Redraft

[ClearlyClaire]

Currently, a client has to parse the formatted status when doing Delete & Redraft.
This is not trivial, and even the WebUI does not do it correctly for mention to users with weird URIs.

This PR returns the status in the delete reply with an additional raw_content field containing exactly the text that was initially input.

[Gargron]

I am a little concerned/unsure about the naming and the semantics of adding stuff to entities--I am not a fan of the source property in the Account entity either. One option is to simply return the content unformatted from that particular response, without adding it into a new property. Since the previous response is empty, it would not mess with current applications...

Another option, instead of creating a raw_content property, is to return a text property instead of the content property, since the real column name is text after all.

[ClearlyClaire]

I'm weary of directly returning the content because it may be an issue for us down the road if we want to add stuff later on. I think having the complete status could be useful for clients as well, depending on how they handle various things… but it probably isn't necessary.

If you prefer text instead of raw_content, that's an easy change I can do right now. I can also remove the content property in that particular case, but I'm not too sure why that would be necessary.

[ClearlyClaire]

I am a little concerned/unsure about the naming and the semantics of adding stuff to entities--I am not a fan of the source property in the Account entity either. One option is to simply return the content unformatted from that particular response, without adding it into a new property. Since the previous response is empty, it would not mess with current applications...

Oh, I think I misunderstood what you meant. Returning the full status but with the contents as plaintext rather than formatted? I think this would be more confusing and error-prone, the nature of the field changing depending on the context does not sit right with me.