more better well factoredness

app/models/solver_run.py

@@ -17,3 +17,13 @@ class SolverRun(BaseModel):
   theta_cut_score: float = 0.00
   advanced_options: Optional[AdvancedOptions]
   engine: str
+
+  def get_item(self, item_id):
+    for item in self.items:
+      if str(item.id) == item_id:
+        return item
+    return False
+
+  def remove_items(self, items):
+    self.items = [item for item in self.items if item not in items]
+    return True