Add unload option to test data script

[NOVA-Openclaw]

Summary

The test data loader (tests/fixtures/load-test-data.sh) can load test data but has no option to remove it.

Current State

• load-test-data.sh loads Alice, Bob, Charlie, etc. into the database
• No way to cleanly remove the test data

Requested

Add an --unload or unload-test-data.sh option that:

1. Removes all test entities (ids 1-15)
2. Removes associated entity_facts
3. Removes test events, places, lessons, tasks
4. Resets sequences appropriately
5. Verifies clean removal

Use Case

Testing workflows need to load → test → unload without leaving test data in the database.

Location

tests/fixtures/load-test-data.sh or new tests/fixtures/unload-test-data.sh

[michaellinhq]

Hi, I reviewed 'Add unload option to test data script' and can start immediately. I can deliver a first usable version quickly and iterate based on your feedback. If this scope still matches your priority, I can proceed right away.