Add legacy AI, RAG vector and Data Safe audit scenarios

scenarios/07-audit-evidence-data-safe/tests/negative_tests.sql

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+PROMPT Negative test: payment operator must not see card_token for Brazil-only payment view.
+SELECT payment_id, customer_name, country, payment_amount, card_token, risk_flag
+FROM dds_audit_payments
+ORDER BY payment_id;
+

scenarios/07-audit-evidence-data-safe/tests/positive_tests.sql

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+PROMPT Positive test: accesses to sensitive payment table generate unified audit events.
+@../sql/05_generate_activity.sql
+