test(benchmark): add vitest scoring tests and update agent count to 22

- Add benchmark-scoring.test.ts with 84 tests for parser, scorer, reporter
- Update agent registry count from 21 to 22 in agent-registry and cleanup tests
- Add harsh-critic to omcSystemPrompt coordination section
- Exclude benchmark test from tsc build (vitest handles its own TS)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tsconfig.json

@@ -17,5 +17,5 @@
     "resolveJsonModule": true
   },
   "include": ["src/**/*"],
-  "exclude": ["node_modules", "dist"]
+  "exclude": ["node_modules", "dist", "src/__tests__/benchmark-scoring.test.ts"]
 }