add code to convert datetime into localtime into file list and add access quarys

dbschema/default.gel

@@ -1,6 +1,18 @@
 module default {
   scalar type access_status extending enum<ok, denied, expired, error>;
 
+  type IPAddr {
+    required value: str {
+      constraint exclusive;
+    }
+  }
+
+  type UserAgent {
+    required value: str {
+      constraint exclusive;
+    }
+  }
+
   type files {
     required file_id: str;
     required file_name: str;
@@ -15,7 +27,9 @@ module default {
       readonly := true;
     }
 
-    multi accesses -> file_access;
+    multi accesses -> file_access {
+      on source delete delete target if orphan;
+    };
     required property user_id: str {
       readonly := true;
     };
@@ -24,14 +38,18 @@ module default {
   }
 
   type file_access {
-    required ip: str;
+    required link ip -> IPAddr {
+      readonly := true;
+      on source delete delete target if orphan;
+    }
+    required link user_agent -> UserAgent {
+      readonly := true;
+      on source delete delete target if orphan;
+    }
+
     required status: access_status {
       default := access_status.ok;
     }
-
-    user_agent: str {
-      readonly := true;
-    };
     required at: datetime {
       readonly := true;
       default := datetime_of_statement();