Populate fed agency seed data

src/registrar/migrations/0077_federalagency.py

@@ -1,7 +1,14 @@
 # Generated by Django 4.2.10 on 2024-03-19 05:42
+# This migration seeds the federal agency table with initial data and manually calls
+# FederalAgency.create_federal_agencies to populate initial table values.
 
 from django.db import migrations, models
+from registrar.models import FederalAgency
+from typing import Any
 
+# For linting: RunPython expects a function reference.
+def create_federal_agencies(apps, schema_editor) -> Any:
+    FederalAgency.create_federal_agencies(apps, schema_editor)
 
 class Migration(migrations.Migration):
 
@@ -23,4 +30,9 @@ class Migration(migrations.Migration):
                 "verbose_name_plural": "Federal agencies",
             },
         ),
+        migrations.RunPython(
+            create_federal_agencies,
+            reverse_code=migrations.RunPython.noop,
+            atomic=True,
+        ),
     ]

src/registrar/models/federal_agency.py

@@ -17,6 +17,9 @@ class FederalAgency(TimeStampedModel):
         help_text="Federal agency",
     )
 
+    def __str__(self) -> str:
+        return self.agency
+
     # TODO: Update parameters to put in
     def create_federal_agencies(apps, schema_editor):
         """This method gets run from a data migration."""