feat(automation): implement readiness probe funtionality

src/automation/.env.example

.../main/java/eu/teraflow/automation/ContextHealthCheck.java

...n/java/eu/teraflow/automation/ContextHealthCheckImpl.java

...c/main/java/eu/teraflow/automation/ContextSubscriber.java

...ain/java/eu/teraflow/automation/SimpleReadinessCheck.java

src/automation/src/main/proto/health.proto

src/automation/src/main/resources/application.yaml

.../target/generated-sources/grpc/grpc/health/v1/Health.java

...get/generated-sources/grpc/grpc/health/v1/HealthBean.java

...t/generated-sources/grpc/grpc/health/v1/HealthClient.java

...get/generated-sources/grpc/grpc/health/v1/HealthGrpc.java

...nerated-sources/grpc/grpc/health/v1/HealthOuterClass.java

...nerated-sources/grpc/grpc/health/v1/MutinyHealthGrpc.java

src/automation/target/kubernetes/kubernetes.yml