ADM-TRANSACTION-552 - Get transaction event details by eventId

GET https://example.com/v1/transactions/events/{eventId}

Returns the details of a single transaction event (e.g. authorization, capture, refund) identified by eventId.

User scoping:

• OPERATOR and SUPPLIER clients only for this route.

Visibility:

• OPERATOR can access any event across all suppliers.
• SUPPLIER can access only events linked to their own logistic orders / transactions.
• If the event is outside the caller visibility scope, return 403.

Scope:

• Provides the fields required to display the Event detail page.