feat: add enterprise identity and channel integrations

backend/apps/channels/migrations/0001_initial.py

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+# Generated by Django 5.2.8 on 2026-07-27
+
+import django.db.models.deletion
+import uuid
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    initial = True
+
+    dependencies = [
+        ("tickets", "0013_ticketsupportanalysis_applied_solution_and_more"),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="ChannelEndpoint",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("public_id", models.UUIDField(default=uuid.uuid4, editable=False, unique=True)),
+                ("name", models.CharField(max_length=120, unique=True)),
+                ("adapter_type", models.CharField(default="generic_webhook", max_length=40)),
+                ("outbound_url", models.URLField(blank=True, max_length=500)),
+                ("webhook_secret_encrypted", models.TextField(blank=True)),
+                ("outbound_token_encrypted", models.TextField(blank=True)),
+                ("enabled", models.BooleanField(default=True)),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                ("created_by", models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name="created_channel_endpoints", to=settings.AUTH_USER_MODEL)),
+            ],
+            options={"ordering": ["name"]},
+        ),
+        migrations.CreateModel(
+            name="ChannelConversation",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("public_id", models.UUIDField(default=uuid.uuid4, editable=False, unique=True)),
+                ("external_conversation_id", models.CharField(max_length=200)),
+                ("title", models.CharField(blank=True, max_length=200)),
+                ("participants", models.JSONField(blank=True, default=list)),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                ("endpoint", models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name="conversations", to="channels.channelendpoint")),
+                ("ticket", models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name="channel_conversations", to="tickets.ticket")),
+            ],
+            options={"ordering": ["-updated_at"]},
+        ),
+        migrations.CreateModel(
+            name="ChannelMessage",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("public_id", models.UUIDField(default=uuid.uuid4, editable=False, unique=True)),
+                ("direction", models.CharField(max_length=16)),
+                ("external_message_id", models.CharField(blank=True, max_length=200)),
+                ("idempotency_key", models.CharField(blank=True, max_length=200)),
+                ("sender", models.CharField(blank=True, max_length=160)),
+                ("message_type", models.CharField(default="text", max_length=24)),
+                ("text", models.TextField(blank=True)),
+                ("payload", models.JSONField(blank=True, default=dict)),
+                ("status", models.CharField(max_length=24)),
+                ("error_message", models.TextField(blank=True)),
+                ("occurred_at", models.DateTimeField(blank=True, null=True)),
+                ("sent_at", models.DateTimeField(blank=True, null=True)),
+                ("delivered_at", models.DateTimeField(blank=True, null=True)),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                ("conversation", models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name="messages", to="channels.channelconversation")),
+                ("created_by", models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name="created_channel_messages", to=settings.AUTH_USER_MODEL)),
+                ("endpoint", models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name="messages", to="channels.channelendpoint")),
+                ("ticket", models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.SET_NULL, related_name="channel_messages", to="tickets.ticket")),
+            ],
+            options={"ordering": ["-created_at"]},
+        ),
+        migrations.CreateModel(
+            name="ChannelReceipt",
+            fields=[
+                ("id", models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name="ID")),
+                ("receipt_type", models.CharField(max_length=24)),
+                ("external_receipt_id", models.CharField(max_length=200)),
+                ("payload", models.JSONField(blank=True, default=dict)),
+                ("received_at", models.DateTimeField(auto_now_add=True)),
+                ("message", models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name="receipts", to="channels.channelmessage")),
+            ],
+            options={"ordering": ["received_at"]},
+        ),
+        migrations.AddConstraint(
+            model_name="channelconversation",
+            constraint=models.UniqueConstraint(fields=("endpoint", "external_conversation_id"), name="unique_channel_external_conversation"),
+        ),
+        migrations.AddIndex(
+            model_name="channelmessage",
+            index=models.Index(fields=["endpoint", "direction", "created_at"], name="channels_ch_endpoin_30d460_idx"),
+        ),
+        migrations.AddIndex(
+            model_name="channelmessage",
+            index=models.Index(fields=["status", "created_at"], name="channels_ch_status_eeefec_idx"),
+        ),
+        migrations.AddConstraint(
+            model_name="channelmessage",
+            constraint=models.UniqueConstraint(condition=models.Q(("external_message_id__gt", "")), fields=("endpoint", "direction", "external_message_id"), name="unique_channel_external_message"),
+        ),
+        migrations.AddConstraint(
+            model_name="channelmessage",
+            constraint=models.UniqueConstraint(condition=models.Q(("idempotency_key__gt", "")), fields=("endpoint", "direction", "idempotency_key"), name="unique_channel_message_idempotency"),
+        ),
+        migrations.AddConstraint(
+            model_name="channelreceipt",
+            constraint=models.UniqueConstraint(fields=("message", "receipt_type", "external_receipt_id"), name="unique_channel_message_receipt"),
+        ),
+    ]

backend/apps/channels/migrations/0002_channelmessage_customer_reply.py

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+import django.db.models.deletion
+from django.db import migrations, models
+from django.db.models import Q
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("channels", "0001_initial"),
+        ("tickets", "0014_customerreplytask_channel_approval"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="channelmessage",
+            name="customer_reply_task",
+            field=models.ForeignKey(
+                blank=True,
+                null=True,
+                on_delete=django.db.models.deletion.PROTECT,
+                related_name="channel_messages",
+                to="tickets.customerreplytask",
+            ),
+        ),
+        migrations.AddField(
+            model_name="channelmessage",
+            name="reply_revision",
+            field=models.PositiveIntegerField(blank=True, null=True),
+        ),
+        migrations.AddConstraint(
+            model_name="channelmessage",
+            constraint=models.UniqueConstraint(
+                fields=("customer_reply_task", "reply_revision"),
+                condition=Q(
+                    direction="outbound",
+                    customer_reply_task__isnull=False,
+                ),
+                name="unique_channel_reply_revision",
+            ),
+        ),
+    ]

backend/apps/channels/migrations/__init__.py

@@ -0,0 +1 @@
+