fix: feat: basic analytics funnel tracking for launch readiness (#1101)

Add self-hosted Umami analytics to replace the third-party cloud.umami.is
tracker. Creates @harb/analytics package with typed event helpers and
instruments the conversion funnel: CTA clicks (landing), wallet connect,
swap initiated, and stake created (web-app).

- Add Umami Docker service sharing existing postgres (separate DB)
- Add Caddy /analytics route to proxy Umami dashboard
- Configure via VITE_UMAMI_URL and VITE_UMAMI_WEBSITE_ID env vars
- Document setup and funnel events in docs/ENVIRONMENT.md

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

landing/package.json

@@ -17,6 +17,7 @@
     "prepare": "husky"
   },
   "dependencies": {
+    "@harb/analytics": "*",
     "@harb/web3": "*",
     "@harb/ui-shared": "*",
     "@tanstack/vue-query": "^5.92.9",