test(are): replace import-only tests with real ARE integration tests

21 integration tests that exercise AREEnvironment against real ARE
apps and scenarios — no mocks. Covers:
- Lifecycle (scenario path, shorthand path, start/stop, pause/resume)
- Tool wrapping (metadata, calling, error tracing, history)
- AUI tool filtering
- Oracle mode with real ARE simulation
- Tracing and config with real tool calls
- Simulation time advancement via wait_for_notification
- Convenience accessors returning real ARE objects

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: cemde