feat(orchestrator): enterprise feature support — CLI provider, submodule profiles, caching, LFS, hooks

Add generic enterprise-grade features to the orchestrator, enabling Unity projects with
complex CI/CD pipelines to adopt game-ci/unity-builder with built-in support for:

- CLI provider protocol: JSON-over-stdin/stdout bridge enabling providers in any language
  (Go, Python, Rust, shell) via the `providerExecutable` input
- Submodule profiles: YAML-based selective submodule initialization with glob patterns
  and variant overlays (`submoduleProfilePath`, `submoduleVariantPath`)
- Local build caching: Filesystem-based Library and LFS caching for local builds without
  external cache actions (`localCacheEnabled`, `localCacheRoot`)
- Custom LFS transfer agents: Register external transfer agents like elastic-git-storage
  (`lfsTransferAgent`, `lfsTransferAgentArgs`, `lfsStoragePaths`)
- Git hooks support: Detect and install lefthook/husky with configurable skip lists
  (`gitHooksEnabled`, `gitHooksSkipList`)

Also removes all `orchestrator-develop` branch references, replacing with `main`.

13 new action inputs, 13 new files, 14 new CLI provider tests, 17 submodule tests,
plus cache/LFS/hooks unit tests. All 452 tests pass.

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

src/model/orchestrator/services/cache/local-cache-service.test.ts

@@ -0,0 +1,124 @@
+import fs from 'node:fs';
+import path from 'node:path';
+import { LocalCacheService } from './local-cache-service';
+
+// Mock dependencies
+jest.mock('node:fs');
+jest.mock('../core/orchestrator-system', () => ({
+  OrchestratorSystem: {
+    Run: jest.fn().mockResolvedValue(''),
+  },
+}));
+jest.mock('../core/orchestrator-logger', () => ({
+  __esModule: true,
+  default: {
+    log: jest.fn(),
+    logWarning: jest.fn(),
+    error: jest.fn(),
+  },
+}));
+
+const mockFs = fs as jest.Mocked<typeof fs>;
+
+describe('LocalCacheService', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  describe('generateCacheKey', () => {
+    it('should generate a key from platform, version, and branch', () => {
+      const key = LocalCacheService.generateCacheKey('StandaloneLinux64', '2021.3.1f1', 'main');
+      expect(key).toBe('StandaloneLinux64-2021_3_1f1-main');
+    });
+
+    it('should sanitize non-alphanumeric characters except hyphens', () => {
+      const key = LocalCacheService.generateCacheKey('WebGL', '2022.3.0f1', 'feature/my-branch');
+      expect(key).toBe('WebGL-2022_3_0f1-feature_my-branch');
+    });
+
+    it('should handle empty branch', () => {
+      const key = LocalCacheService.generateCacheKey('StandaloneWindows64', '2021.3.1f1', '');
+      expect(key).toBe('StandaloneWindows64-2021_3_1f1-');
+    });
+  });
+
+  describe('resolveCacheRoot', () => {
+    const originalEnv = process.env;
+
+    beforeEach(() => {
+      process.env = { ...originalEnv };
+    });
+
+    afterEach(() => {
+      process.env = originalEnv;
+    });
+
+    it('should use localCacheRoot when set', () => {
+      const result = LocalCacheService.resolveCacheRoot({ localCacheRoot: '/custom/cache' });
+      expect(result).toBe('/custom/cache');
+    });
+
+    it('should use RUNNER_TEMP when localCacheRoot is empty', () => {
+      process.env.RUNNER_TEMP = '/tmp/runner';
+      const result = LocalCacheService.resolveCacheRoot({ localCacheRoot: '' });
+      expect(result).toBe(path.join('/tmp/runner', 'game-ci-cache'));
+    });
+
+    it('should fall back to .game-ci/cache when neither is set', () => {
+      delete process.env.RUNNER_TEMP;
+      const result = LocalCacheService.resolveCacheRoot({ localCacheRoot: '' });
+      expect(result).toBe(path.join(process.cwd(), '.game-ci', 'cache'));
+    });
+  });
+
+  describe('restoreLibraryCache', () => {
+    it('should return false on cache miss (directory does not exist)', async () => {
+      (mockFs.existsSync as jest.Mock).mockReturnValue(false);
+      const result = await LocalCacheService.restoreLibraryCache('/project', '/cache', 'key1');
+      expect(result).toBe(false);
+    });
+
+    it('should return false when cache directory has no tar files', async () => {
+      (mockFs.existsSync as jest.Mock).mockReturnValue(true);
+      (mockFs.readdirSync as jest.Mock).mockReturnValue(['readme.txt', 'info.json']);
+      const result = await LocalCacheService.restoreLibraryCache('/project', '/cache', 'key1');
+      expect(result).toBe(false);
+    });
+  });
+
+  describe('saveLibraryCache', () => {
+    it('should skip save when Library folder does not exist', async () => {
+      (mockFs.existsSync as jest.Mock).mockReturnValue(false);
+      await LocalCacheService.saveLibraryCache('/project', '/cache', 'key1');
+      // Should not throw, just log and return
+      expect(mockFs.mkdirSync).not.toHaveBeenCalled();
+    });
+
+    it('should create cache directory structure', async () => {
+      (mockFs.existsSync as jest.Mock).mockReturnValue(true);
+      (mockFs.readdirSync as jest.Mock).mockImplementation((dirPath: string) => {
+        if (String(dirPath).includes('Library') && !String(dirPath).includes('cache')) {
+          return ['file1.asset', 'file2.asset'];
+        }
+
+        return [];
+      });
+      (mockFs.statSync as jest.Mock).mockReturnValue({ mtimeMs: Date.now() });
+      (mockFs.mkdirSync as jest.Mock).mockReturnValue(undefined);
+
+      const { OrchestratorSystem } = require('../core/orchestrator-system');
+      OrchestratorSystem.Run.mockResolvedValue('');
+
+      await LocalCacheService.saveLibraryCache('/project', '/cache', 'key1');
+      expect(mockFs.mkdirSync).toHaveBeenCalledWith(path.join('/cache', 'key1', 'Library'), { recursive: true });
+    });
+  });
+
+  describe('garbageCollect', () => {
+    it('should skip when cache root does not exist', async () => {
+      (mockFs.existsSync as jest.Mock).mockReturnValue(false);
+      await LocalCacheService.garbageCollect('/nonexistent');
+      // Should not throw
+    });
+  });
+});