refactor: extract stat parsing logic to shared module

Move YAML and CSV stat parsing logic from CLI and journal components
into a new shared `stat-parser.ts` module to enable reuse between
the CLI scanner and the client-side frontend.

tsconfig.cli.json

@@ -13,8 +13,8 @@
     "declaration": true,
     "outDir": "./dist",
     "rootDir": "./src",
-    "lib": ["ES2022", "DOM", "DOM.Iterable"]
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
   },
   "include": ["src/cli/**/*"],
-  "exclude": ["node_modules", "dist"]
+  "exclude": ["node_modules", "dist"],
 }