[api] refactor another route for speed

/search/attribute?namespace=OBS&name=ProjectStatusPackageFailComment&project=openSUSE:Factory

before: 720ms, after: 31ms
[api] catch net timeouts on bugzilla - happens rather often
[api] cache the project name for project/status

Otherwise we reload the projects again and again
[webui] a live log without repository given is 404