Add Fizzy one-click service

Add Basecamp's Fizzy Kanban tracking tool as a one-click deployable service.

- Uses official Docker image: ghcr.io/basecamp/fizzy:main
- PostgreSQL database with auto-generated credentials
- Rails environment with SECRET_KEY_BASE and RAILS_MASTER_KEY
- VAPID keys for web push notifications
- Health checks on /up endpoint
- Persistent storage for Rails storage directory

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

public/svgs/fizzy.svg

@@ -0,0 +1,27 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" fill="none">
+  <!-- Background circle -->
+  <circle cx="50" cy="50" r="48" fill="#0EA5E9" stroke="#0284C7" stroke-width="2"/>
+
+  <!-- Kanban board representation -->
+  <g transform="translate(20, 25)">
+    <!-- First column -->
+    <rect x="0" y="0" width="16" height="50" rx="2" fill="white" opacity="0.9"/>
+    <rect x="2" y="4" width="12" height="8" rx="1" fill="#0EA5E9"/>
+    <rect x="2" y="14" width="12" height="8" rx="1" fill="#0EA5E9"/>
+    <rect x="2" y="24" width="12" height="8" rx="1" fill="#0EA5E9"/>
+
+    <!-- Second column -->
+    <rect x="22" y="0" width="16" height="50" rx="2" fill="white" opacity="0.9"/>
+    <rect x="24" y="4" width="12" height="8" rx="1" fill="#0EA5E9"/>
+    <rect x="24" y="14" width="12" height="8" rx="1" fill="#0EA5E9"/>
+
+    <!-- Third column -->
+    <rect x="44" y="0" width="16" height="50" rx="2" fill="white" opacity="0.9"/>
+    <rect x="46" y="4" width="12" height="8" rx="1" fill="#0EA5E9"/>
+  </g>
+
+  <!-- Sparkle/Fizzy effect -->
+  <circle cx="75" cy="30" r="3" fill="#FCD34D" opacity="0.9"/>
+  <circle cx="70" cy="20" r="2" fill="#FCD34D" opacity="0.7"/>
+  <circle cx="80" cy="25" r="2.5" fill="#FCD34D" opacity="0.8"/>
+</svg>