chainquery / sdk naming discrepancies

[tzarebczan]

1. we store the sd_hash in a field called sd_hash - it should instead be called source, with the type coming from sourceType.

2. missing claim sequence (there are some changes coming here with normalization I think)

3. missing amount - the original claim amount - not the effective amount (which we have)

4. missing supports - link to the supports table?

5. missing license / license url / preview (@tiger5226 started working on this one already)

6. publisher vs channel (i.e. publisher_id vs channel_id)

[tiger5226]

@tzarebczan feel free to update this issue if needed.