Add Django site, Docker packaging, and beta/prod Gitea deploys.

Unignore site/ (was blocked by mkdocs /site rule), add compose/Docker/uv tooling, and split deploys so push to main goes to beta while prod stays manual.

site/messaging/tasks.py

@@ -0,0 +1,45 @@
+from django.tasks import task
+from django.utils import timezone
+
+from messaging.channels import dispatch_message
+from messaging.models import Message
+from messaging.services import contact_may_receive
+
+
+@task
+def send_campaign_message(message_id: str) -> None:
+    try:
+        message = Message.objects.select_related("contact", "campaign").get(
+            pk=message_id
+        )
+    except Message.DoesNotExist:
+        return
+
+    if not contact_may_receive(message.contact, message.channel):
+        message.status = Message.Status.SUPPRESSED
+        message.error = "Contact opted out or suppressed"
+        message.save(update_fields=["status", "error", "updated_at"])
+        return
+
+    try:
+        result = dispatch_message(message)
+        message.status = Message.Status.SENT
+        message.provider = result.provider
+        message.provider_message_id = result.provider_id
+        message.sent_at = timezone.now()
+        message.error = ""
+        message.save(
+            update_fields=[
+                "status",
+                "provider",
+                "provider_message_id",
+                "sent_at",
+                "error",
+                "updated_at",
+            ]
+        )
+    except Exception as exc:  # noqa: BLE001 — persist provider failures
+        message.status = Message.Status.FAILED
+        message.error = str(exc)[:2000]
+        message.save(update_fields=["status", "error", "updated_at"])
+        raise