queue-core: Redis Streams implementation

- Redis Streams implementation with consumer groups (ade-workers)
- Task interface with serialization/deserialization
- Worker with heartbeat (5s) and task claiming
- Retry logic with exponential backoff and jitter
- Delayed task support via Sorted Sets
- Dead worker reclamation (30s timeout)
- Unit tests: 26 passing
- TypeScript compilation successful

jest.config.js

@@ -0,0 +1,13 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  roots: ['<rootDir>/tests'],
+  testMatch: ['**/*.test.ts'],
+  collectCoverageFrom: [
+    'src/**/*.ts',
+    '!src/**/*.d.ts',
+  ],
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1',
+  },
+};