use TEXT datatype for dumps and reduce artifact column length to 100

create-db.sql

@@ -9,13 +9,13 @@
   
   CREATE TABLE users (
   	user_id		varchar(100) primary key,
-  	user_dump	varchar(5000),
-  	session_dump	varchar(5000)
+  	user_dump	text,
+  	session_dump	text
   );
   
   CREATE TABLE assertions (
-        artifact        varchar(5000),
-        assertion       varchar(5000)
+        artifact        varchar(100),
+        assertion       text
   );
   
   GRANT DELETE, INSERT, SELECT, UPDATE ON nameidentifiers TO idpc;