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/analytics/models.py

@@ -0,0 +1,37 @@
+from django.db import models
+
+from core.models import TimeStampedModel, UUIDPrimaryKeyModel
+from leads.models import Lead
+
+
+class UTMVisit(UUIDPrimaryKeyModel, TimeStampedModel):
+    correlation_id = models.CharField(max_length=64, db_index=True)
+    path = models.CharField(max_length=512, blank=True)
+    referrer = models.URLField(blank=True, max_length=1024)
+    utm_source = models.CharField(max_length=128, blank=True)
+    utm_medium = models.CharField(max_length=128, blank=True)
+    utm_campaign = models.CharField(max_length=128, blank=True)
+    utm_term = models.CharField(max_length=128, blank=True)
+    utm_content = models.CharField(max_length=128, blank=True)
+    user_agent = models.CharField(max_length=512, blank=True)
+
+    class Meta:
+        ordering = ["-created_at"]
+
+    def __str__(self) -> str:
+        return f"{self.utm_source or 'direct'} / {self.path}"
+
+
+class Attribution(TimeStampedModel):
+    lead = models.OneToOneField(
+        Lead, on_delete=models.CASCADE, related_name="attribution"
+    )
+    visit = models.ForeignKey(
+        UTMVisit, null=True, blank=True, on_delete=models.SET_NULL
+    )
+    utm_source = models.CharField(max_length=128, blank=True)
+    utm_medium = models.CharField(max_length=128, blank=True)
+    utm_campaign = models.CharField(max_length=128, blank=True)
+
+    def __str__(self) -> str:
+        return f"attr {self.lead_id} ← {self.utm_source or 'direct'}"