Catch breaking import error

[tarun-google]

Fix breaking import in internal repo which does not contain envoy-rate-limiter.

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[gemini-code-assist]

Summary of Changes

Hello @tarun-google, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a critical import error that previously occurred in environments lacking the envoy-rate-limiter dependency. By implementing a conditional import for the RateLimiter component, the system can now gracefully handle its absence, preventing crashes and ensuring broader compatibility for internal repositories. This change enhances the robustness and adaptability of the apache_beam.ml.inference.base module.

Highlights

• Conditional Import: The RateLimiter import in apache_beam.ml.inference.base.py has been made conditional, wrapping it in a try-except ImportError block.
• Error Handling: If the RateLimiter cannot be imported (e.g., due to missing envoy-rate-limiter dependency), the RateLimiter variable is now set to None instead of causing a hard crash.

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[tarun-google]

R: @Abacn

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control. If you'd like to restart, comment assign set of reviewers

[tarun-google]

Run Python_Runners PreCommit 3.12

[Abacn]

Thanks!