@W-21570079 Track request latency metrics that exposes tool data

[jarhun88]

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Description

creating a way to track request latency for monitoring purposes

Here is what the latency metric looks like:

[2026-03-12T23:27:40.861Z] [stdout] �[32m'{\n'�[39m +
  �[32m'  "tags": {\n'�[39m +
  �[32m'    "agent_language": "nodejs",\n'�[39m +
  �[32m'    "agent_version": "2.3.1",\n'�[39m +
  �[32m'    "device": "jsong-ltmrqfc.internal.salesforce.com",\n'�[39m +
  �[32m'    "env": "dev",\n'�[39m +
  �[32m'    "process_runtime_version": "22.15.0",\n'�[39m +
  �[32m'    "process_runtime_name": "nodejs",\n'�[39m +
  �[32m'    "http_request_method": "post",\n'�[39m +
  �[32m'    "http_route": "_tableau-mcp",\n'�[39m +
  �[32m'    "http_response_status_code": "200",\n'�[39m +
  �[32m'    "tool_name": "list-datasources",\n'�[39m +
  �[32m'    "server": "https___test-dataplane7_tableau_sfdc-ckzqgc_svc_sfdcfc_net",\n'�[39m +
  �[32m'    "site_id": "3d2acf7b-8dd6-4afc-9a86-6a1eb2a1b525"\n'�[39m +
  �[32m'  },\n'�[39m +
  �[32m'  "service": "tableau-mcp",\n'�[39m +
  �[32m'  "subservice": "",\n'�[39m +
  �[32m'  "scope": [\n'�[39m +
  �[32m'    "my-org",\n'�[39m +
  �[32m'    "my-team",\n'�[39m +
  �[32m'    "my-app"\n'�[39m +
  �[32m'  ],\n'�[39m +
  �[32m'  "timestamp": 1773358060857,\n'�[39m +
  �[32m'  "metricName": [\n'�[39m +
  �[32m'    "apm_apm_http_server_request_duration"\n'�[39m +
  �[32m'  ],\n'�[39m +
  �[32m'  "metricValue": 290.44022692499965\n'�[39m +
  �[32m'}

Motivation and Context

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Other (please describe):

How Has This Been Tested?

Related Issues

Checklist

• I have updated the version in the package.json file by using npm run version. For example,
  use npm run version:patch for a patch version bump.
• I have made any necessary changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have documented any breaking changes in the PR description. For example, renaming a config
  environment variable or changing its default value.

Contributor Agreement

By submitting this pull request, I confirm that:

• I have read the CONTRIBUTING guidelines for this project and followed
  its Contribution Checklist.

[anyoung-tableau]

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