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/admin.py

@@ -0,0 +1,14 @@
+from django.contrib import admin
+
+from analytics.models import Attribution, UTMVisit
+
+
+@admin.register(UTMVisit)
+class UTMVisitAdmin(admin.ModelAdmin):
+    list_display = ("utm_source", "utm_campaign", "path", "created_at")
+    search_fields = ("utm_source", "utm_campaign", "correlation_id")
+
+
+@admin.register(Attribution)
+class AttributionAdmin(admin.ModelAdmin):
+    list_display = ("lead", "utm_source", "utm_campaign", "created_at")