artemis: upgrade to PostreSQL 17

Author: NyCodeGHG

hosts/artemis/postgres.nix

@@ -2,10 +2,6 @@
 {
   services.postgresql = {
     enable = true;
-    package = pkgs.postgresql_15;
-    settings = {
-      max_wal_senders = 3;
-      wal_level = "replica";
-    };
+    package = pkgs.postgresql_17;
   };
 }