Add rate limiting for task updates

[snopoke]

Summary

• Add rate limiting capabilities for task progress updates based on time and value intervals
• Allow specifying minimum ping intervals to reduce update frequency
• Optimize API usage by preventing unnecessary updates
• Fix datetime deprecation warnings

Test plan

• Added comprehensive tests for time and value interval checks
• Verified both progress update methods respect interval settings
• Confirmed ping intervals work correctly with the time-based checks

🤖 Generated with Claude Code

[Copilot]

PR Overview

This PR adds rate limiting capabilities to task updates by introducing time‐ and value‐based interval checks along with configurable ping intervals to optimize API usage and reduce unnecessary updates.

• Added tests for rate limiting using time and value intervals as well as combined checks.
• Updated the Task API methods (increment_progress, update_progress, ping) to respect new interval parameters.
• Revised test utilities to use full datetime import for consistency.

Reviewed Changes

File	Description
tests/test_sdk.py	Added tests for new rate limiting functionality on task updates.
taskbadger/sdk.py	Updated task update methods to include configurable intervals.
tests/utils.py	Modified datetime usage to match the new import style.

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.