opentelemetry-util-genai 0.4b0

[github-actions[bot]]

• Add AgentInvocation type with invoke_agent span lifecycle (#4274)
• Add metrics support for EmbeddingInvocation (#4377)
• Add support for workflow in genAI utils handler. (#4366)
• Enrich ToolCall type, breaking change: usage of ToolCall class renamed to ToolCallRequest (#4218)
• Add EmbeddingInvocation span lifecycle support (#4219)
• Populate schema_url on metrics (#4320)
• Add workflow invocation type to genAI utils (#4310)
• Check if upload works at startup in initializer of the UploadCompletionHook, instead of repeatedly failing on every upload (#4390).
• Refactor public API: add factory methods (start_inference, start_embedding, start_tool, start_workflow) and invocation-owned lifecycle (invocation.stop() / invocation.fail(exc)); rename LLMInvocation → InferenceInvocation and ToolCall → ToolInvocation. Existing usages remain fully functional via deprecated aliases. (#4391)
• TelemetryHandler now accepts a completion_hook parameter and calls it after each LLM invocation, passing inputs, outputs, the active span, and the log record. Content capture is enabled automatically when a real hook is configured. (#4315)
• Add metrics to ToolInvocations (#4443)
• Wrap completion hooks loaded via load_completion_hook so exceptions raised by on_completion are logged and swallowed instead of propagating to instrumentation call sites.

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This discussion was created from the release opentelemetry-util-genai 0.4b0.