add abra command for vacuum full

abra.sh

@@ -10,6 +10,16 @@ export WK_SERVER_VERSION=v1
 export WK_CLIENT_VERSION=v1
 export PG_BACKUP_VERSION=v2
 export ADMIN_CONFIG_VERSION=v1
+export COMPRESS_STATE_ENTRYPOINT_VERSION=v5
+
+vacuum_state() {
+    echo "WARNING: VACUUM FULL locks the state_groups_state table."
+    echo "Synapse will be unable to process events until this completes."
+    echo "Running VACUUM FULL on state_groups_state..."
+    psql -U synapse -d synapse -c "VACUUM FULL state_groups_state;"
+    echo "VACUUM FULL complete."
+    psql -U synapse -d synapse -c "SELECT pg_size_pretty(pg_total_relation_size('state_groups_state'::regclass)) AS size;"
+}
 
 set_admin () {
     admin=akadmin