Cloudflare Worker Test Harness

Integration tests for a real Cloudflare Worker build using wrangler's createTestHarness(), which runs your production output in a local preview server and is driven from an ordinary Node test process. Covers getDurableObjectStorage().exec() to seed and assert SQLite rows, evictDurableObject() to prove state survives a teardown, listDurableObjectIds(), getEnv() for direct Durable Object RPC, plus getLogs, clearLogs, reset, and debug. Ships with the Worker under test: a SQLite-backed rate limit Durable Object with an alarm sweep and a declarative exports config.