Implement lock mechanism for Outbox Event Log

Purpose/Overview:

In this story we need to implement locking mechanism for Outbox Event Log functionality.

Requirements/Scope:

• Create table with 1 row that will used for locking
• Implement SELECT FOR UPDATE query as lock in AuditOutboxService to allow read from outbox_events table only from single instance
• Test is lock released when instance fail randomly
• Test and verify all audit log functionality together