Focus coverage on core logic (config, extraction, utils)

- Exclude UI, telemetry, commands from coverage reports
- Exclude extension.ts, types.ts, and benchmark files
- Align with numbers-le, string-le, envsync-le standards

Author: nolindnaidoo

vitest.config.ts

@@ -16,15 +16,27 @@ export default defineConfig({
           statements: 80,
         },
       },
+      include: [
+        'src/config/**/*.ts',
+        'src/extraction/**/*.ts',
+        'src/utils/**/*.ts',
+      ],
       exclude: [
+        'src/**/*.test.ts',
+        'src/**/*.bench.ts',
+        'test/**',
+        'dist/**',
+        'src/__mocks__/**',
+        'src/types.ts',
+        'src/extension.ts',
+        'src/commands/**',
+        'src/ui/**',
+        'src/telemetry/**',
         '**/node_modules/**',
-        '**/dist/**',
         '**/coverage/**',
         '**/release/**',
         '**/docs/**',
         '**/*.config.*',
-        '**/__mocks__/**',
-        '**/test/**',
       ],
     },
     include: ['src/**/*.test.ts', 'src/**/*.spec.ts'],