Got rid of bridge and fixed GTFS compliance

- Ported the bridge that was using a custom GTFS class and Pandas
  Dataframes to a native Django solution for and interface between db
  and csv (see api/io.py)
- Fixed some issues regarding the compliance of the exported csv files
  with the GTFS reference. I.e. now allowing times 24:00:00 <= t >=
  24:59:59

transport_accessibility/pt_map/migrations/0004_remove_trip_shape_id_trip_shape_id.py

@@ -0,0 +1,22 @@
+# Generated by Django 5.0.6 on 2024-06-22 09:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pt_map', '0003_faretransferrule_feed_info_id'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='trip',
+            name='shape_id',
+        ),
+        migrations.AddField(
+            model_name='trip',
+            name='shape_id',
+            field=models.ManyToManyField(blank=True, related_name='shape', to='pt_map.shape'),
+        ),
+    ]

transport_accessibility/pt_map/migrations/0005_alter_trip_shape_id.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.0.6 on 2024-06-22 09:40
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pt_map', '0004_remove_trip_shape_id_trip_shape_id'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='trip',
+            name='shape_id',
+            field=models.ManyToManyField(blank=True, related_name='trips', to='pt_map.shape'),
+        ),
+    ]

transport_accessibility/pt_map/migrations/0006_alter_bookingrule_end_time_and_more.py

@@ -0,0 +1,53 @@
+# Generated by Django 5.0.6 on 2024-06-23 20:37
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pt_map', '0005_alter_trip_shape_id'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bookingrule',
+            name='end_time',
+            field=models.CharField(blank=True, max_length=7, null=True),
+        ),
+        migrations.AlterField(
+            model_name='bookingrule',
+            name='start_time',
+            field=models.CharField(blank=True, max_length=7, null=True),
+        ),
+        migrations.AlterField(
+            model_name='frequency',
+            name='end_time',
+            field=models.CharField(max_length=7),
+        ),
+        migrations.AlterField(
+            model_name='frequency',
+            name='start_time',
+            field=models.CharField(max_length=7),
+        ),
+        migrations.AlterField(
+            model_name='stoptime',
+            name='arrival_time',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+        migrations.AlterField(
+            model_name='stoptime',
+            name='departure_time',
+            field=models.CharField(blank=True, max_length=7, null=True),
+        ),
+        migrations.AlterField(
+            model_name='timeframe',
+            name='end_time',
+            field=models.CharField(max_length=7),
+        ),
+        migrations.AlterField(
+            model_name='timeframe',
+            name='start_time',
+            field=models.CharField(max_length=7),
+        ),
+    ]

transport_accessibility/pt_map/migrations/0007_alter_bookingrule_end_time_and_more.py

@@ -0,0 +1,48 @@
+# Generated by Django 5.0.6 on 2024-06-23 21:26
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pt_map', '0006_alter_bookingrule_end_time_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bookingrule',
+            name='end_time',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+        migrations.AlterField(
+            model_name='bookingrule',
+            name='start_time',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+        migrations.AlterField(
+            model_name='frequency',
+            name='end_time',
+            field=models.CharField(max_length=255),
+        ),
+        migrations.AlterField(
+            model_name='frequency',
+            name='start_time',
+            field=models.CharField(max_length=255),
+        ),
+        migrations.AlterField(
+            model_name='stoptime',
+            name='departure_time',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+        migrations.AlterField(
+            model_name='timeframe',
+            name='end_time',
+            field=models.CharField(max_length=255),
+        ),
+        migrations.AlterField(
+            model_name='timeframe',
+            name='start_time',
+            field=models.CharField(max_length=255),
+        ),
+    ]

transport_accessibility/pt_map/migrations/0008_alter_timeframe_service_id_alter_trip_service_id.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.0.6 on 2024-06-23 23:00
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pt_map', '0007_alter_bookingrule_end_time_and_more'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='timeframe',
+            name='service_id',
+            field=models.CharField(max_length=255),
+        ),
+        migrations.AlterField(
+            model_name='trip',
+            name='service_id',
+            field=models.CharField(max_length=255),
+        ),
+    ]