audit_events.md: integrity_violation, init_audit

• audit_events.md: fixup jsons
• audit_events.md: integrity_violation (#215)
• audit_events.md: create_table, drop_table minor rewording
• audit_events.md: init_audit (#217)
• audit_events.md: fix punctuation

---

• Close #215, #217
• Part of #209 (closed)
• Target branch: main
• Changes should be cherry-picked to 24.2: yes
• Staging: https://docs.binary.picodata.io/picodata/rosik_audit_events/reference/audit_events/#integrity_violation