feat(nip66): add relay monitor settings schema and defaults

[Ferryx349]

Description

Add nip66.* settings (probe interval, timeouts, targets, monitor key, DNS cache TTL) to default-settings.yaml and settings types, config only, no worker yet. Disabled by default.

Related Issue

fixes - #687

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Non-functional change (docs, style, minor refactor)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my code changes.
• I added a changeset, or this is docs-only and I added an empty changeset.
• All new and existing tests passed.

[changeset-bot]

🦋 Changeset detected

Latest commit: 4c4032d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
nostream	Minor

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[coveralls]

Coverage is 67.664% — Ferryx349:nip-66-settings into cameri:main. No base build found for cameri:main.

[Copilot]

Pull request overview

Adds the foundational configuration surface for a future NIP-66 relay monitor by introducing nip66.* settings defaults, TypeScript settings types, documentation entries, and unit tests to ensure default/override behavior. This aligns with issue #687’s “config only” scope.

Changes:

• Add nip66 settings block (enabled flag, probe interval, timeouts, targets, monitor identity, DNS cache TTL) to default-settings.yaml.
• Add Nip66Settings / Nip66ProbeTimeouts to the Settings TypeScript types and a unit test validating defaults + override merge behavior.
• Document the new settings and introduce an example env var + changeset entry.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
test/unit/utils/settings.spec.ts	Adds tests asserting nip66 defaults exist and that user config overrides merge correctly.
src/@types/settings.ts	Introduces Nip66Settings / Nip66ProbeTimeouts and wires nip66 into the Settings interface.
resources/default-settings.yaml	Adds a new nip66: defaults block (disabled by default).
CONFIGURATION.md	Documents the new nip66.* settings (but currently includes duplicated rows and wording that implies implementation exists).
.env.example	Adds MONITOR_PRIVATE_KEY to the example environment file.
.changeset/nip66-settings-foundation.md	Adds a minor changeset describing the new settings foundation.

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