Patchwork could store test logs server side

Log coming from tests should be store into DB
### Ideas

The system should be able to store the logs coming from the tests done for specific series. There are two possible ways to do this
1. Adding another field in the JSON POST request

POST /api/1.0/series/47/test-results/ HTTP/1.1

{
"test_name": "checkpatch.pl",
"state": "success",
"url": "",
"summary": "total: 0 errors, 0 warnings, 10 lines checked"
"log": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
}
2. Allowing another post route to accept the following request

POST /api/1.0/series/47/test-results/log HTTP/1.1

{
"log": "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
}

Option 1 looks a bit redundant to have two fields (url and log) containing the same content. Option 2 is perhaps cleaner but users needs to do a second request, affecting the user experience and perhaps hitting the server performance.

Some related questions: can users post a log of any side? should log be stored into the DB, or just in the filesystem and server just need to store the filename?
### Refefences
- http://patchwork-freedesktop.readthedocs.org/en/latest/rest.html#post--api-1.0-series-(int-series_id)-revisions-(int- version)-test-results-