fix(cfg): enable finalize-on-close for aiml-checkpointing profile

[vipnydav]

Description

This PR enables finalize-on-close by default for the aiml-checkpointing profile to prevent checkpoint loading failures caused by stale metadata.

Background:
As discovered in b/540250863 during checkpoint benchmarking, when a directory rename occurs, GCSFuse invalidates cached entries under the old folder prefix. A subsequent ListObjects call on the new directory re-populates the cache.

However, because zonal buckets use the appendable API where objects are not finalized on write by default, ListObjects can return a stale, intermediate object size for these unfinalized objects. Since the aiml-checkpointing profile sets an infinite metadata cache TTL (metadata-cache.ttl-secs = -1), this stale size is cached permanently in RAM, which ultimately causes OUT_OF_RANGE errors during checkpoint loading.

Enabling finalize on close explicitly finalizes the object, avoiding the asynchronous metadata propagation delay for unfinalized appendable objects.

Link to the issue in case of a bug fix.

b/544523257

Testing details

1. Manual - NA
2. Unit tests - Added test cases for aiml-checkpointing profile in cfg/config_test.go
3. Integration tests - NA

Any backward incompatible change? If so, please explain.

NA

[gemini-code-assist]

Code Review

This pull request adds the "aiml-checkpointing" profile optimization rule to the configuration. However, the changes in cfg/config.go and cfg/config_test.go were made manually. Since these files are auto-generated, they should not be edited directly; instead, you should modify cfg/params.yaml and run the generation command to regenerate them automatically.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.82%. Comparing base (0673d19) to head (3b68fbe).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5003      +/-   ##
==========================================
+ Coverage   83.81%   83.82%   +0.01%     
==========================================
  Files         174      174              
  Lines       21376    21376              
==========================================
+ Hits        17916    17919       +3     
+ Misses       2779     2776       -3     
  Partials      681      681              

Flag	Coverage Δ
unittests	83.82% <ø> (+0.01%)	⬆️

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[github-actions]

Hi @charith87, your feedback is needed to move this pull request forward. This automated reminder was triggered because there has been no activity for over 24 hours. Please provide your input when you have a moment. Thank you!

[github-actions]

Hi @charith87, your feedback is needed to move this pull request forward. This automated reminder was triggered because there has been no activity for over 24 hours. Please provide your input when you have a moment. Thank you!

[github-actions]

Hi @charith87, your feedback is needed to move this pull request forward. This automated reminder was triggered because there has been no activity for over 24 hours. Please provide your input when you have a moment. Thank you!

[github-actions]

Hi @charith87, your feedback is needed to move this pull request forward. This automated reminder was triggered because there has been no activity for over 24 hours. Please provide your input when you have a moment. Thank you!