Synch

- Add support to postgres.
- Config file update, see detail in `synch.ini`.
- Rename project name to `synch`.

- Fix sql covert to clickhouse.
- Fix delete bug.

- Fix full data etl with composite primary key and skip when no primary key.
- Move `queue_max_len` to redis section.
- Add `debug` in `synch.ini` and remove from cli.
- Add `auto_full_etl` in `synch.ini`.

- Fix insert interval block.
- Add kafka broker.
- Add signal to handle stop.

- Add queue_max_len config.
- Enable redis sentinel.
- Add support `change column`.