feat: add Rust reverse proxy with JSON logging

- Axum-based API server with Unix socket and TCP support
- Custom tracing formatters for Railway-compatible JSON logs
- SvelteKit hooks and Vite plugin for unified logging
- Justfile updated for concurrent dev workflow with hl log viewer

web/package.json

@@ -16,6 +16,7 @@
     "@fontsource-variable/inter": "^5.1.0",
     "@fontsource/hanken-grotesk": "^5.1.0",
     "@fontsource/schibsted-grotesk": "^5.2.8",
+    "@logtape/logtape": "^1.3.5",
     "bits-ui": "^2.8.2",
     "clsx": "^2.1.1",
     "tailwind-merge": "^3.3.1"
@@ -26,6 +27,8 @@
     "@sveltejs/kit": "^2.21.0",
     "@sveltejs/vite-plugin-svelte": "^6.2.1",
     "@tailwindcss/vite": "^4.1.11",
+    "@types/node": "^25.0.3",
+    "concurrently": "^9.2.1",
     "eslint": "^9.39.2",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-svelte": "^3.13.1",