HIE-5 Make the Patient Interceptor configurable explicitly

[suubi-joshua]

Linked Issue: https://openmrs.atlassian.net/browse/HIE-5

Added explicit configuration for Client Registry Events enablement:

Added new global property constant GP_CLIENT_REGISTRY_EVENTS_ENABLE
Introduced eventsEnabled configuration field
Events processing now requires both explicit enablement and valid server URL configuration
Improves configuration clarity and control over event-based functionality

[suubi-joshua]

@samuelmale is this something close to what you were thinking of?

[DeepakJain06]

The method isClientRegistryEventsEnabled() correctly checks if events are enabled, but should we also consider fetching this value from a global property instead of just relying on environment variables?"
🔹 "Instead of using Boolean.TRUE.equals(eventsEnabled), you could simply use Boolean.TRUE.equals(eventsEnabled) && StringUtils.isNotBlank(getClientRegistryServerUrl()) inline to improve readability."