Changes

| app_build_id || varchar || Firefox build ID(e.g. 20160801085519)

| app_display_version || varchar ||Firefox version (e.g. 50.0a2)

| app_name || varchar ||Platform?

| app_version || varchar ||What's the difference with app_display_version?

| uid || varchar ||Hashed Sync/FxA ID

| deviceid || varchar ||Browser profile id? Not currently captured.

| when || bigint ||Linux time stamp of when error occurred.

| took || bigint ||???

| failurereason || row(name varchar, value varchar) ||Sync failure reason

| status || row(sync varchar, service varchar) ||??

| why || varchar ||??

| engines || array(row(name varchar, took bigint, status varchar, failureReason row(name varchar, value varchar), incoming row(applied bigint, failed bigint, newFailed bigint, reconciled bigint), outgoing array(row(sent bigint, failed bigint))))|| ??

| submission_date_s3 || varchar ||??