fix for non bundles runs as well as some typing

app/helpers/solver_helper.py

@@ -1,12 +1,14 @@
-from pulp import lpSum
+from pulp import lpSum, LpProblem
 from random import randint, sample
 import logging
 
 from models.bundle import Bundle
+from models.solver_run import SolverRun
+from models.item import Item
 
 from lib.errors.item_generation_error import ItemGenerationError
 
-def build_constraints(solver_run, problem, items, bundles):
+def build_constraints(solver_run: SolverRun, problem: LpProblem, items: list[Item]) -> LpProblem:
   logging.info('Creating Constraints...')
 
   try: