Add wrapTools() for LangChain4j tool instrumentation #27
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Implements ByteBuddy-based proxy wrapper that creates OpenTelemetry spans for @tool annotated methods, capturing parameters, outputs, execution time, and exceptions. Includes comprehensive tests, runnable example, and README documentation.
…handling - Fixed LangchainToolWrappingExample to set braintrust.input_json and braintrust.output_json on all spans (conversation, turn, tool) - Added testToolWrappingIntegrationWithConversationHierarchy to verify full span hierarchy has required attributes - Updated README with note on setting Braintrust attributes on parent spans for proper UI display
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Implements ByteBuddy-based proxy wrapper that creates OpenTelemetry spans for @tool annotated methods, capturing parameters, outputs, execution time, and exceptions. Includes comprehensive tests, runnable example, and README documentation.