[BUG] Postgres conflict_target bug

[eliasdarruda]

When using persistent lookups on postgres, as the "actor" column that is used for the conflict_target doesnt have a constraint, it errors. We should use id to match the constraint correctly

spawn-proxy-botserver_1  | 2023-07-08 00:19:42.526 [spawn_actors_node@127.0.0.1]:[pid=<0.2917.0> ]:[error]:GenServer #PID<0.2917.0> terminating
spawn-proxy-botserver_1  | ** (Postgrex.Error) ERROR 42P10 (invalid_column_reference) there is no unique or exclusion constraint matching the ON CONFLICT specification
spawn-proxy-botserver_1  |     (ecto_sql 3.10.1) lib/ecto/adapters/sql.ex:913: Ecto.Adapters.SQL.raise_sql_call_error/1
spawn-proxy-botserver_1  |     (ecto 3.10.1) lib/ecto/repo/schema.ex:764: Ecto.Repo.Schema.apply/4
spawn-proxy-botserver_1  |     (ecto 3.10.1) lib/ecto/repo/schema.ex:377: anonymous fn/15 in Ecto.Repo.Schema.do_insert/4
spawn-proxy-botserver_1  |     (spawn_statestores_postgres 0.0.0-local.dev) lib/statestores/adapters/postgres_lookup_adapter.ex:55: Statestores.Adapters.PostgresLookupAdapter.set/3
spawn-proxy-botserver_1  |     (spawn 0.0.0-local.dev) lib/spawn/cluster/state_handoff/controllers/persistent_controller.ex:89: Spawn.Cluster.StateHandoff.Controllers.PersistentController.set/4
spawn-proxy-botserver_1  |     (spawn 0.0.0-local.dev) lib/spawn/cluster/state_handoff/manager.ex:113: Spawn.Cluster.StateHandoff.Manager.handle_info/2
spawn-proxy-botserver_1  |     (stdlib 5.0.2) gen_server.erl:1077: :gen_server.try_handle_info/3
spawn-proxy-botserver_1  |     (stdlib 5.0.2) gen_server.erl:1165: :gen_server.handle_msg/6

Saving state errors too

spawn-proxy-botserver_1  | ** (Postgrex.Error) ERROR 42P10 (invalid_column_reference) there is no unique or exclusion constraint matching the ON CONFLICT specification
spawn-proxy-botserver_1  |     (ecto_sql 3.10.1) lib/ecto/adapters/sql.ex:913: Ecto.Adapters.SQL.raise_sql_call_error/1
spawn-proxy-botserver_1  |     (ecto 3.10.1) lib/ecto/repo/schema.ex:764: Ecto.Repo.Schema.apply/4
spawn-proxy-botserver_1  |     (ecto 3.10.1) lib/ecto/repo/schema.ex:377: anonymous fn/15 in Ecto.Repo.Schema.do_insert/4
spawn-proxy-botserver_1  |     (spawn_statestores_postgres 0.0.0-local.dev) lib/statestores/adapters/postgres_snapshot_adapter.ex:27: Statestores.Adapters.PostgresSnapshotAdapter.save/1
spawn-proxy-botserver_1  |     (elixir 1.14.5) lib/task/supervised.ex:89: Task.Supervised.invoke_mfa/2
spawn-proxy-botserver_1  |     (elixir 1.14.5) lib/task/supervised.ex:34: Task.Supervised.reply/4
spawn-proxy-botserver_1  |     (stdlib 5.0.2) proc_lib.erl:241: :proc_lib.init_p_do_apply/3