Document pprof-auth-enabled config option in Enterprise v1

[Copilot]

Closes #

The pprof-auth-enabled configuration option exists in Enterprise v1 source code but was missing from documentation. This option controls authentication for debug endpoints (/debug/pprof, /debug/requests, /debug/vars).

Changes

• Added pprof-auth-enabled section to Enterprise v1 data node configuration reference
• Positioned after pprof-enabled following the same order as OSS v1
• Adapted content from OSS v1 config reference to match Enterprise v1 formatting conventions

Screenshot

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• Signed the InfluxData CLA
  (if necessary)
• Rebased/mergeable

Original prompt

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This section details on the original issue you should resolve

<issue_title>Enterprise v1 pprof-auth-enabled config option</issue_title>
<issue_description>Enterprise v1 should document pprof-auth-enabled, as in OSS v1. See the OSS v1 config reference and the v1-to-v2 upgrade guide.

Source code:
https://github.com/influxdata/influxdb/blob/24931213998286d07ab832339b53fa0ef503516b/services/httpd/config.go#L45|existed.

Slack Message</issue_description>

<agent_instructions>Copy the option and its usage documentation from content/influxdb/v1 to content/enterprise_influxdb/v1</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Enterprise v1 pprof-auth-enabled config option #6586

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