[OPIK-5664] [SDK] fix: improve batching warning with actionable alternatives

[alexkuzmik]

Details

Improves the batching data loss warning message to:

• Clarify the risk applies specifically to updates shortly after creation
• Suggest disabling batching via Opik(batching=False)
• Suggest using @track decorator or start_as_current_span context manager as safer alternatives

Before:

Calling Span.end() with batching enabled may cause data loss — updates can be dropped if they arrive before the create request is flushed.

After:

Calling Span.end() shortly after creation with batching enabled may cause data loss — the update can be dropped if it arrives before the batched create request is flushed. Consider disabling batching via Opik(batching=False), or using the @track decorator or start_as_current_span context manager instead.

Change checklist

• User facing
• Documentation update

Issues

• OPIK-5664

Testing

N/A — message string change only.

Documentation

N/A