app-autotest/tests

Pytest suite for critical regressions from audit rounds.

Covers:

• /api/scenario/run status mapping: lock_check=None -> 503, False -> 409.
• Unique violation on scenario_runs insert maps to 409.
• db.scenario_defs.lock_check DB-unavailable semantics (None).
• Static guards for DB partial unique index and escName escape chain.

This suite is intentionally lightweight and mock-heavy. No integration DB or external API calls are required.