Eagerly load area attributes in place indexing

convert_place used as wscompat converter for place core calls
convert_area_inner as well which accesses area.type.gid, area.type.name,
area.begin_date, area.end_date, area.ended so eagerly load it.

sir/schema/__init__.py

@@ -286,7 +286,9 @@
                 "aliases.type.gid", "aliases.sort_name",
                 "aliases.locale", "aliases.primary_for_locale",
                 "aliases.begin_date", "aliases.end_date",
-                "area.gid", "type.gid"]
+                "area.gid", "area.type.gid", "area.type.name",
+                "area.begin_date", "area.end_date", "area.ended",
+                "type.gid"]
 )