Improve the bugbot rule name reporting in the logs

[suhaibmujahid]

Fixes #2754

Checklist

• Type annotations added to new functions
• Docs added to functions touched in main classes
• Dry-run produced the expected results
• The to-be-announced tag added if this is worth announcing

[Copilot]

Pull Request Overview

This PR refactors logging initialization to move the "Run rule" log message from __init__ to the run() method, while also improving type annotations and logging format consistency.

• Moved logging statement from constructor to run() method for better timing
• Added type annotation to logger_extra dictionary
• Updated log formatting from .format() to string interpolation with %s

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
bugbot/init.py	Added type annotation dict[str, str] to logger_extra and removed default None value
bugbot/bzcleaner.py	Moved "Run rule" log statement from __init__ to run() method and switched from .format() to %s string interpolation

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