[BUG] Example from README.md with schedule source not updated

[danfimov]

taskiq-postgresql version

0.4.0

Python version

Python 3.12

PostgreSQL driver

asyncpg

PostgreSQL version

18

What happened?

If you get code from example from here: https://github.com/z22092/taskiq-postgresql?tab=readme-ov-file#task-scheduling

You will get:

1. Import error (because I can't import PostgresqlSchedulerSource from taskiq_postgresql, only from taskiq_postgresql.schedule_source)
2. Error while trying to pass various arguments to cheduler_source.add_schedule instead of one ScheduledTask instance.

Expected behavior

Example from readme.md should work without addition changes, I guess)

Steps to reproduce

1. Copy code from example: https://github.com/z22092/taskiq-postgresql?tab=readme-ov-file#task-scheduling
2. See errors in IDE and cry

Minimal code example

Relevant log output

Additional context