refactor of model targets and constraints, addition of new constraint types and constraint construction process

app/models/constraints/total_form_items_constraint.py

@@ -0,0 +1,33 @@
+from __future__ import annotations
+from typing import TYPE_CHECKING
+
+from models.constraints.generic_constraint import *
+
+if TYPE_CHECKING:
+    from models.solver_run import SolverRun
+
+class TotalFormItemsConstraint(GenericConstraint):
+    @classmethod
+    def create(cls: Type[_T], total_items: int) -> _T:
+        return cls(
+            minimum=0,
+            maximum=0,
+            reference_attribute=Attribute(
+                value=total_items,
+                type='form_uniqueness',
+                id='form_uniqueness'
+            )
+        )
+
+    def build(self, problem_handler: Problem, **kwargs) -> None:
+        logging.info('Total Form Items Constraint Generating...')
+
+        problem_handler.problem += lpSum(
+            [
+                bundle.count * problem_handler.solver_bundles_var[bundle.id]
+                for bundle in problem_handler.bundles
+            ] + [
+                1 * problem_handler.solver_items_var[item.id]
+                for item in problem_handler.items
+            ]
+        ) == self.reference_attribute.value, f'Total bundle form items for form'