- Extract ipl() from main() with env-aware error handling (fatal in prod, warn in dev)
- Add amqp::validate() — TCP reachability check for RabbitMQ at IPL
- Refactor config::load() into load() + load_from() for testability
- Add lib.rs to expose public API to integration test harness
- Add test fixture scaffolding: tests/fixtures/beds_test.toml, tests/common/mod.rs
- Add unit tests for amqp::validate() error paths (closed port, bad address)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
