Clean up OTel instrumentation for AskAi

[reakaleek]

No description provided.

[Copilot]

Pull Request Overview

This PR refactors the OpenTelemetry instrumentation for the AskAI streaming API to align with GenAI semantic conventions, consolidates telemetry configuration, and renames event types for clarity. The changes simplify telemetry collection while improving observability standards compliance.

• Renamed Chunk and ChunkComplete events to MessageChunk and MessageComplete for consistency with semantic conventions
• Refactored OpenTelemetry configuration into a centralized OpenTelemetryExtensions class with proper AOT compatibility
• Simplified streaming telemetry by removing granular per-token activities and focusing on conversation-level metrics

Reviewed Changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/tooling/docs-builder/docs-builder.csproj	Added OpenTelemetry package references for the docs-builder CLI tool
src/tooling/docs-builder/Http/DocumentationWebHost.cs	Minor formatting change adding empty line
src/api/Elastic.Documentation.Api.Lambda/Program.cs	Replaced inline EDOT configuration with centralized extension method call
src/api/Elastic.Documentation.Api.Infrastructure/OpenTelemetryExtensions.cs	New extension method consolidating OpenTelemetry configuration with AOT support
src/api/Elastic.Documentation.Api.Infrastructure/Elastic.Documentation.Api.Infrastructure.csproj	Added OpenTelemetry package dependencies
src/api/Elastic.Documentation.Api.Infrastructure/Adapters/AskAi/StreamTransformerBase.cs	Refactored telemetry to align with GenAI semantic conventions and simplified activity tracking
src/api/Elastic.Documentation.Api.Infrastructure/Adapters/AskAi/LlmGatewayStreamTransformer.cs	Updated event names and added error event parsing for LLM Gateway
src/api/Elastic.Documentation.Api.Infrastructure/Adapters/AskAi/AgentBuilderStreamTransformer.cs	Updated event names, made helper methods static, and removed duplicate error logging
src/api/Elastic.Documentation.Api.Core/SerializationContext.cs	Added telemetry types for OpenTelemetry message serialization
src/api/Elastic.Documentation.Api.Core/AskAi/AskAiUsecase.cs	Simplified telemetry setup using GenAI semantic conventions
src/api/Elastic.Documentation.Api.Core/AskAi/AskAiEvent.cs	Renamed Chunk to MessageChunk and ChunkComplete to MessageComplete
src/Elastic.Documentation.Site/Assets/web-components/SearchOrAskAi/AskAi/StreamingAiMessage.tsx	Updated TypeScript to reference renamed event types
src/Elastic.Documentation.Site/Assets/web-components/SearchOrAskAi/AskAi/ChatMessage.tsx	Updated TypeScript to reference renamed event types
src/Elastic.Documentation.Site/Assets/web-components/SearchOrAskAi/AskAi/AskAiEvent.ts	Updated TypeScript event type constants and schemas
Directory.Packages.props	Updated OpenTelemetry package versions to 1.13.x