Refactor test utilities and enhance ASGI settings

- Cleaned up and standardized assertions in ApiTestMixin for API response validation.
- Updated ASGI settings to use os.environ for setting the DJANGO_SETTINGS_MODULE.
- Removed unused imports and improved formatting in settings.py.
- Refactored URL patterns in urls.py for better readability and organization.
- Enhanced view functions in views.py for consistency and clarity.
- Added .flake8 configuration for linting and style enforcement.
- Introduced type stubs for django-environ to improve type checking with Pylance.

parks/models/location.py

@@ -1,17 +1,14 @@
 from django.contrib.gis.db import models
 from django.contrib.gis.geos import Point
-from django.contrib.gis.measure import D
-from django.core.validators import MinValueValidator, MaxValueValidator
 
 
 class ParkLocation(models.Model):
     """
     Represents the geographic location and address of a park, with PostGIS support.
     """
+
     park = models.OneToOneField(
-        'parks.Park',
-        on_delete=models.CASCADE,
-        related_name='location'
+        "parks.Park", on_delete=models.CASCADE, related_name="location"
     )
 
     # Spatial Data
@@ -19,14 +16,14 @@ class ParkLocation(models.Model):
         srid=4326,
         null=True,
         blank=True,
-        help_text="Geographic coordinates (longitude, latitude)"
+        help_text="Geographic coordinates (longitude, latitude)",
     )
 
     # Address Fields
     street_address = models.CharField(max_length=255, blank=True)
     city = models.CharField(max_length=100, db_index=True)
     state = models.CharField(max_length=100, db_index=True)
-    country = models.CharField(max_length=100, default='USA')
+    country = models.CharField(max_length=100, default="USA")
     postal_code = models.CharField(max_length=20, blank=True)
 
     # Road Trip Metadata
@@ -40,7 +37,7 @@ class ParkLocation(models.Model):
     osm_type = models.CharField(
         max_length=10,
         blank=True,
-        help_text="Type of OpenStreetMap object (node, way, or relation)"
+        help_text="Type of OpenStreetMap object (node, way, or relation)",
     )
 
     @property
@@ -72,7 +69,7 @@ class ParkLocation(models.Model):
             self.city,
             self.state,
             self.postal_code,
-            self.country
+            self.country,
         ]
         return ", ".join(part for part in address_parts if part)
 
@@ -109,7 +106,7 @@ class ParkLocation(models.Model):
     class Meta:
         verbose_name = "Park Location"
         verbose_name_plural = "Park Locations"
-        ordering = ['park__name']
+        ordering = ["park__name"]
         indexes = [
-            models.Index(fields=['city', 'state']),
-        ]
+            models.Index(fields=["city", "state"]),
+        ]