- Added/Updated headers
- Added script to update copyright headers

- disabled event testing; operation works, but sometimes tests get stuck
- added dynamic wait for CockroachDB and NATS containers to start
- tuned grace shutdown period
- improved NatsBackend termination

- corrected unitary test order and one-by-one execution
- extractedunitary test constant to separate file
- added updated_at refresh for Service and Slice entities
- corrected return types for Connection entity
- prepared PolicyRule entity to raise events and corrected return types of methods

- configured constant with event collection timeout for unitary tests and debug purposes
- cosmetic changes
- migrated event reporting for Connection entity

- updated run_tests_locally script
- updated GitLab CI/CD with NATS
- updated ContextModel and TopologyModel with created/updated
- added logic for Context and Topology events created/updated/deleted
- activated dependencies for test_connection
- activated event testing in Context and Topology entities
- corrected conftest for Context component

- extended grpc-to-enum tool to support arbitrary enum item names
- added PolicyRuleState enum model
- misc minor comment corrections
- misc import reorderings
- migrated Connection model and methods
- migrated PolicyRule model and methods
- removed unused files