feat: add optional methods for schedule sources

[danfimov]

No description provided.

[Copilot]

Pull Request Overview

This PR adds optional methods for schedule sources to enable runtime schedule management. The key changes include adding add_schedule, delete_schedule, and post_send methods to schedule source implementations, refactoring shared code to the base class, and improving SQL query safety.

Key changes:

• Added add_schedule and delete_schedule methods to all schedule source implementations
• Moved duplicated schedule extraction logic from individual implementations to base class
• Enhanced SQL security using parameterized queries with proper identifier handling

Reviewed Changes

Copilot reviewed 14 out of 15 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/taskiq_pg/_internal/schedule_source.py	Added shared extract_scheduled_tasks_from_broker method to base class
src/taskiq_pg/psycopg/schedule_source.py	Implemented add/delete/post_send methods with SQL injection protection
src/taskiq_pg/psqlpy/schedule_source.py	Implemented add/delete/post_send methods
src/taskiq_pg/asyncpg/schedule_source.py	Implemented add/delete/post_send methods
src/taskiq_pg/aiopg/schedule_source.py	Implemented add/delete/post_send methods
src/taskiq_pg/*/queries.py	Added DELETE_SCHEDULE_QUERY constant
tests/integration/test_schedule_source.py	Added integration tests for new schedule management methods
docs/tutorial/schedule_source.md	Added documentation for runtime schedule management
pyproject.toml	Added polyfactory test dependency and enabled pydocstyle

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