- Add `max_requests` parameter to `fetch_date_range()` to limit API requests
- Add `AWAIR_TEST_MODE` and `AWAIR_TEST_MAX_REQUESTS` environment variables
- `awair lambda test` now defaults to 1 API request (was unlimited)
- Override with: `AWAIR_TEST_MAX_REQUESTS=5 awair lambda test`
- Bump version to 0.0.6

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