How to build scheduler (high-level)

## Milestone 1 (YT PoC)

- define schema for YT, high-level:

Account:
yt_acc:
- uid
- next_scan_time

Video:
yt_vid:
- uid
- next_scan_time

Pagination offsets:
yt_offsets_<offset_name>:
- uid
- offsets

yt_metric_<metric_name>:
- uid
- value

- write aiomysql-based component which does:
  1. Consul-based service discovery for RDS
  2. Resolves the properties of RemoteEntity to table names.

- implement business logic for trends strategy based on that schema
- deploy the trends strategy flow for YT