fix: added sem field in init sql

Author: harshkhandeparkar

backend/src/db/queries.rs

@@ -12,7 +12,8 @@ CREATE TABLE IF NOT EXISTS iqps (
 	course_code TEXT NOT NULL DEFAULT '',
 	course_name TEXT NOT NULL,
 	year INTEGER NOT NULL,
-    exam TEXT,
+    exam TEXT NOT NULL DEFAULT '',
+    semester TEXT NOT NULL DEFAULT '',
     filelink TEXT NOT NULL,
     from_library BOOLEAN DEFAULT FALSE,
     upload_timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,