fix: address review findings from recenterAccess cleanup (#887)

- Remove permanently unreachable guard branches from evaluateRecenterOpportunity
- Remove orphaned getWalletAddress() from BlockchainService
- Simplify RecenterAccessStatus type: drop always-null recenterAccessAddress
  and slot fields, narrow hasAccess to boolean
- Update /status endpoint to match simplified type
- Remove test script (no test files remain)
- Revert unrelated kraiken-lib/package-lock.json churn

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

services/txnBot/package.json

@@ -8,7 +8,6 @@
     "build": "tsc -p tsconfig.build.json",
     "start": "node dist/service.js",
     "dev": "tsx watch src/service.ts",
-    "test": "node --test --import tsx",
     "lint": "eslint src/**/*.ts",
     "lint:fix": "eslint --fix src/**/*.ts",
     "format": "prettier --write src/**/*.ts",