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>

packages/analytics/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "@harb/analytics",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "main": "src/index.ts",
+  "types": "src/index.ts"
+}