Add migrations for PipelineLock and Pipeline modifications

src/api/src/backend/migrations/0030_pipeline_enabled_pipeline_lock_expiration_policy_and_more.py

@@ -0,0 +1,41 @@
+# Generated by Django 4.1.2 on 2024-05-13 16:29
+
+import backend.views.http.requests
+from django.db import migrations, models
+import django.db.models.deletion
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('backend', '0029_pipelinerun_description_pipelinerun_name'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='pipeline',
+            name='enabled',
+            field=models.BooleanField(default=True),
+        ),
+        migrations.AddField(
+            model_name='pipeline',
+            name='lock_expiration_policy',
+            field=models.CharField(choices=[(backend.views.http.requests.EnumLockExpirationPolicy['NoOp'], backend.views.http.requests.EnumLockExpirationPolicy['NoOp']), (backend.views.http.requests.EnumLockExpirationPolicy['DeleteLock'], backend.views.http.requests.EnumLockExpirationPolicy['DeleteLock']), (backend.views.http.requests.EnumLockExpirationPolicy['DisablePipeline'], backend.views.http.requests.EnumLockExpirationPolicy['DisablePipeline'])], default=backend.views.http.requests.EnumLockExpirationPolicy['DisablePipeline'], max_length=16),
+        ),
+        migrations.CreateModel(
+            name='PipelineLock',
+            fields=[
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('acquired_at', models.DateTimeField(default=None, null=True)),
+                ('expires_in', models.BigIntegerField(default=0)),
+                ('uuid', models.UUIDField(default=uuid.uuid4, primary_key=True, serialize=False)),
+                ('pipeline', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='pipelinelocks', to='backend.pipeline')),
+                ('pipeline_run', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='pipelinelocks', to='backend.pipelinerun')),
+            ],
+        ),
+        migrations.AddConstraint(
+            model_name='pipelinelock',
+            constraint=models.UniqueConstraint(fields=('pipeline', 'pipeline_run'), name='pipelinelock_pipeline_pipeline_run'),
+        ),
+    ]