fix(attic): adjust PostgreSQL config for atticd ownership

- Rename `attic` database to `atticd` and set `atticd` user as the owner directly.
- Remove redundant `postStart` script for altering database ownership.
- Update `database.url` to match the renamed database.

systems/x86_64-linux/attic/atticd.nix

@@ -7,14 +7,13 @@
 {
   services.postgresql = {
     enable = true;
-    ensureDatabases = [ "attic" ];
-    ensureUsers = [{ name = "atticd"; }];
+    ensureDatabases = [ "atticd" ];
+    ensureUsers = [{
+      name = "atticd";
+      ensureDBOwnership = true;
+    }];
   };
 
-  systemd.services.postgresql.postStart = lib.mkAfter ''
-    psql -d postgres -tAc 'ALTER DATABASE "attic" OWNER TO "atticd"'
-  '';
-
   environment.systemPackages = with pkgs; [ attic-client ];
   services.atticd = {
     enable = true;
@@ -27,7 +26,7 @@
 
       garbage-collection.default-retention-period = "3 months";
 
-      database.url = "postgresql:///attic?host=/run/postgresql";
+      database.url = "postgresql:///atticd?host=/run/postgresql";
 
       listen = "[::]:8080";