Fix db file being overwritten at startup

src/lib/db.py

@@ -75,12 +75,10 @@ def seed_db() -> None:
 
 
 def init_db():
+    if Path(DB_PATH).exists():
+        return
     with open(SQL_PATH, "r") as f:
         sql = f.read()
     with get_connection() as conn:
         conn.execute(sql)
     seed_db()
-
-
-if __name__ == "__main__":
-    init_db()