fix: resolve broken migration dependencies and references after company app removal

- Updated migration files to remove references to the old `companies` app and replace them with new app dependencies (`operators` and `manufacturers`).
- Fixed foreign key references in migration files to point to the correct models in the new apps.
- Updated import statements in management commands and test files to reflect the new app structure.
- Completed a thorough validation of the migration system to ensure full functionality and operational status.

parks/management/commands/seed_ride_data.py

@@ -1,6 +1,6 @@
 from django.core.management.base import BaseCommand
 from django.utils import timezone
-from companies.models import Manufacturer
+from manufacturers.models import Manufacturer
 from parks.models import Park
 from rides.models import Ride, RollerCoasterStats
 from decimal import Decimal

parks/migrations/0001_initial.py

@@ -13,7 +13,7 @@ class Migration(migrations.Migration):
     initial = True
 
     dependencies = [
-        ("companies", "0001_initial"),
+        ("operators", "0001_initial"),
         ("pghistory", "0006_delete_aggregateevent"),
     ]
 
@@ -200,7 +200,7 @@ class Migration(migrations.Migration):
                         on_delete=django.db.models.deletion.DO_NOTHING,
                         related_name="+",
                         related_query_name="+",
-                        to="companies.company",
+                        to="operators.operator",
                     ),
                 ),
                 (