Correct Prometheus property key

Fix the Prometheus metrics property name in application.properties: changed "management.metrics.export.prometheus.enabled" to "management.prometheus.metrics.export.enabled" so the Prometheus exporter is enabled correctly under the expected property path (src/main/resources/application.properties).

Author: vitorhugo-java

src/main/resources/application.properties

@@ -50,7 +50,7 @@ spring.mail.properties.mail.smtp.writetimeout=5000
 # ===== Actuator / Management Endpoints =====
 management.endpoints.web.exposure.include=health,info,prometheus
 management.endpoint.health.show-details=always
-management.metrics.export.prometheus.enabled=true
+management.prometheus.metrics.export.enabled=true
 
 # Application settings
 app.name=${APP_NAME:EspacoGeek}