feat(deploy): Datasette analytics sidecar + analytics.aleshym.co ingress

Adds a Datasette container alongside the existing server in the same pod so
it can read the SQLite PVC without a second ReadWriteOnce mount. Protected
by a Traefik BasicAuth middleware at analytics.aleshym.co.

Also fixes the ArgoCD repoURL to point to the migrated Gitea hostname
(git.aleshym.co) instead of the old bare IP.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

deploy/middleware-analytics-auth.yaml

@@ -0,0 +1,8 @@
+apiVersion: traefik.containo.us/v1alpha1
+kind: Middleware
+metadata:
+  name: analytics-auth
+  namespace: solitaire
+spec:
+  basicAuth:
+    secret: analytics-auth-secret