Improvements for handling missed "meeting_ended" and "recording_ready" callbacks (#5327)

* Initial commit

* Remove unused files

* Improvements in error handling, refactoring

* add running_meeting_checker spec

* improve recordings_poller

* remove provider scoping, improve code with logs

* rubo

* Fix Dockerfile, docker-compose

* fix logs issue

* remove database name from docker-compose

* Rework poller script to match start script

* Put proper image to docker-compose