Modify autovacuum config for devices and users tables

[jgrevich]

DB config change needed to support https://github.com/18F/identity-devops/issues/4175

Tested in pt env

              == 20220307214616 PostgreSqlAutovacuumConfig: migrating =======================
              -- execute("        ALTER TABLE \"devices\" SET (autovacuum_vacuum_scale_factor = 0.02,\n                                        autovacuum_analyze_scale_factor = 0.01,\n                                        autovacuum_vacuum_threshold = 0);\n\n        ALTER TABLE \"users\" SET (autovacuum_vacuum_scale_factor = 0.02,\n                                        autovacuum_analyze_scale_factor = 0.01,\n                                        autovacuum_vacuum_threshold = 0);\n")
                 -> 0.0036s
              == 20220307214616 PostgreSqlAutovacuumConfig: migrated (0.0089s) ==============
              
              deploy/migrate finished

[zachmargolis]

LGTM but before merging, I think you need to run this locally and check in the version number change to schema.rb

[jgrevich]

Thanks. I wondered about that. It did execute on a migration host as shown above but making sure schema.rb is also up to date makes sense. I'll take care of that.