- testing CI/CD pipeline

- added logs to CI/CD pipeline for debug purposes

- removed unneeded files
- added control when no database engine can be instantiated
- added missing assertions in device and link unitary tests

- corrected report of config rules updated
- corrected update notifications for Device
- removed unneeded log messages
- migrated events for Link entity

- cosmetic changes
- activated correct events to collect for device unitary test

- corrected run_tests_locally script
- solved formatting issue with Database Engine error logging
- minor type hinting corrections
- activated event notifications for Device, EndPoint and ConfigRule

- corrected Topology unitary test

- corrected CI/CD pipeline

- added missing requirement
- corrected unitary test Topology

- 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

- Added backend for NATS message broker
- removed unneeded test script

- corrected metrics names

- corrected logger instantiation
- arranged performance collector for unit tests
- moved performance evaluation dump method to Metrics Pool

- corrected imports of Method Wrappers API

- corrected slice and service methods

- disabled Redis MessageBroker backend

- updated CI/CD pipeline

- updated CI/CD pipeline

- updated CI/CD pipeline

- corrected requirements
- updated CI/CD pipeline

- repositioned Database Engine class
- updated CI/CD pipeline

- updated to new Method Wrapper API

Performance Evaluation Framework + Helper Tools

See merge request !36

- 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

- minor cosmetic changes

- updated policy rule object factory
- updated rpc method wrapper decorator's duration buckets

- moved relational models to associated classes
- migrated support for slice subslices
- added filters to prevent upsert when there is nothing to update