MCP: make Elasticsearch failures visible as failing APM transactions#3466

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Commits on Jun 3, 2026

MCP: surface failing transactions when Elasticsearch is unhealthy

reakaleek
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claude
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MCP: fix integration tests broken by CallToolResult return type change

reakaleek
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claude
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MCP: address coderabbit review — rethrow caller cancellation in health check, assert IsError in integration tests

reakaleek
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claude
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