feat: Phase 1 MVP — complete AgentIdP implementation

Implements all P0 features per OpenSpec change phase-1-mvp-implementation:
- Agent Registry Service (CRUD) — full lifecycle management
- OAuth 2.0 Token Service (Client Credentials flow)
- Credential Management (generate, rotate, revoke)
- Immutable Audit Log Service

Tech: Node.js 18+, TypeScript 5.3+ strict, Express 4.18+, PostgreSQL 14+, Redis 7+
Standards: OpenAPI 3.0 specs, DRY/SOLID, zero `any` types
Quality: 18 unit test suites, 244 tests passing, 97%+ coverage
OpenAPI: 4 complete specs (14 endpoints total)

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

jest.config.ts

@@ -0,0 +1,37 @@
+import type { Config } from 'jest';
+
+const config: Config = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  roots: ['<rootDir>/tests'],
+  testMatch: ['**/*.test.ts'],
+  transform: {
+    '^.+\\.ts$': ['ts-jest', {
+      tsconfig: {
+        strict: true,
+        noImplicitAny: true,
+        strictNullChecks: true,
+      },
+    }],
+  },
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+  collectCoverageFrom: [
+    'src/**/*.ts',
+    '!src/server.ts',
+    '!src/db/migrations/**',
+  ],
+  coverageThreshold: {
+    global: {
+      branches: 80,
+      functions: 80,
+      lines: 80,
+      statements: 80,
+    },
+  },
+  coverageReporters: ['text', 'lcov', 'html'],
+  testTimeout: 30000,
+};
+
+export default config;