fix(anthropic): do not mutate when media present

[hassiebp]

Important

Fixes data mutation issue in media_manager.py by copying dictionaries before processing Anthropic media, ensuring data integrity.

• Behavior:
  • In media_manager.py, _process_data_recursively() now creates a shallow copy of the data dictionary before modifying it when processing Anthropic media.
  • This prevents unintended mutations of the original dictionary, ensuring data integrity.
• Tests:
  • Added sleep(1) in test_openai.py to ensure proper timing for asynchronous operations.

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Greptile Summary

Disclaimer: Experimental PR review

Fixes a data mutation issue in Anthropic media handling by implementing safe dictionary copying in langfuse/_task_manager/media_manager.py.

• Modified media manager to create a shallow copy of input dictionary before processing Anthropic media data, preventing unintended side effects from direct mutations
• Important defensive programming fix that maintains data integrity when the same dictionary is referenced elsewhere in the codebase

[greptile-apps]

LGTM

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