feat: add verbose option in optimize_fn

[deependujha]

Before submitting

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• Did you make sure to update the docs?
• Did you write any new necessary tests?

What does this PR do?

Gives flexibility to disable logs while optimizing. This can be helpful when you have multiple datasets that you wish to optimize and are not interested in each operation, but rather in the progress bar.

Used by Ultralytics PR when optimizing train, test & val datasets.

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[Copilot]

Pull Request Overview

Adds a verbose flag to both the top-level optimize function and the DataProcessor class so users can disable internal print calls when they only want progress bars or external logging.

• Introduces a verbose: bool = True parameter to optimize and propagates it to internal logic.
• Adds a verbose parameter to DataProcessor.__init__, stores it as self.verbose, and guards all existing print calls.
• Updates function calls within optimize and DataProcessor to pass and check the new verbose flag.

Reviewed Changes

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

File	Description
src/litdata/processing/functions.py	Added verbose parameter to optimize, updated signature docs, gated prints, and passed verbose along to child calls.
src/litdata/processing/data_processor.py	Added verbose parameter to DataProcessor, stored as self.verbose, and wrapped all existing console output under if self.verbose: checks.

Comments suppressed due to low confidence (2)

src/litdata/processing/functions.py:413

• The optimize() docstring should include the verbose parameter in the Args section with its type and description to match the style used for other parameters.

    verbose: bool = True,

src/litdata/processing/functions.py:413

• Add unit tests to verify that setting verbose=False actually suppresses all console output in both optimize() and DataProcessor to guard against future regressions.

    verbose: bool = True,

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 4 lines in your changes missing coverage. Please review.

Project coverage is 83%. Comparing base (54cb63b) to head (804e279).
Report is 1 commits behind head on main.

Additional details and impacted files

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  Coverage    83%    83%           
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  Files        49     49           
  Lines      6761   6778   +17     
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+ Hits       5642   5657   +15     
- Misses     1119   1121    +2     

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