feat(nip66): add shared relay probe engine (DNS, TLS, WS RTT, NIP-11)

[Ferryx349]

Description

This PR adds a shared relay probe engine for NIP-66 groundwork. It introduces runProbe(relayUrl) with structured per-check results for DNS, TLS, WebSocket open RTT, and NIP-11.

Related Issue

Fixes :- #669

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: a812bfc

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: 67.284% (-0.4%) from 67.674% — Ferryx349:NIP-66 into cameri:main

[Copilot]

Pull request overview

This PR introduces a reusable relay probe engine (NIP-66 groundwork) that can run DNS, TLS, WebSocket open-RTT, and NIP-11 checks against a relay URL and return structured per-check results.

Changes:

• Adds runProbe(relayUrl) with pluggable clients and per-check timing/status reporting.
• Implements Node-backed probe clients for DNS, TLS, WebSocket RTT, and NIP-11 (with SSRF redirect guards).
• Adds unit tests and a changeset for the new probing module.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
test/unit/utils/relay-probe.spec.ts	Adds unit coverage for target parsing, safety checks, caching, and runProbe behavior.
src/utils/relay-probe/ws-rtt-probe.ts	Implements a Node ws-based connector and WebSocket open-RTT probe.
src/utils/relay-probe/types.ts	Defines probe result/status types and default timeout/cache constants.
src/utils/relay-probe/tls-probe.ts	Implements a Node TLS connector and certificate probing logic.
src/utils/relay-probe/target.ts	Parses relay URLs into normalized probe targets and detects network type.
src/utils/relay-probe/run-probe.ts	Orchestrates parallel probe execution, DNS caching, and result shaping.
src/utils/relay-probe/nip11-probe.ts	Implements NIP-11 fetch/validation with redirect safety checks.
src/utils/relay-probe/index.ts	Exposes the probe engine public API (functions + types).
src/utils/relay-probe/dns-probe.ts	Implements DNS record collection via Node DNS promises.
src/utils/relay-probe/dns-cache.ts	Adds an in-memory DNS result cache with TTL expiration.
.knip.json	Ignores the new probe module for knip unused-code checks.
.changeset/nip66-probe-engine.md	Declares a minor release for the new probe engine feature.

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