50a7a3a61d
We want to serialize these label values into the secondary index so we can avoid database lookups and submit rule evaluation when rendering change tables. The easiest way to do this is to use Gerrit's protobuf support to convert them to protos to store in the index. This is built around @Column annotations, so use that. Move to the reviewdb package to pick up the necessary gwtorm dependency. Change-Id: I02b4a14404a8d8d72452fea68f0c25f3cbb377f8