Upgrades to WebSocket architecture, aligned with other SDKs

[tiagosiebler]

Summary

The WebSocket client architecture saw many improvements with the newer SDKs. This PR cleans up some of the tech debt, bringing this in line with the other SDKs. Less differences -> easier long-term maintainability:

• Bump audit dependencies
• Add wsUrl & WS ref to open & reconnected events
• Normalise internal emittable event structure handling via safer getFinalEmittable normaliser
• Add authPrivateConnectionsOnConnect mechanic
• Normalise internal logger category, optional WS API Auth flag
• Normalise internal WS behaviour flags
• Add internal requireConnectionReady & useNativeHeartbeats flags
• Integrate custom reconnection hook mechanic.

Additional Information

PR Checklist

As part of the PR, make sure you have:

• No breaking changes / documented all breaking changes clearly.
• Updated & checked that all tests pass.
• Increased the version number in the package.json
• Checked npm install runs without issue.
• Included the package-lock.json, if it changed after npm install
• Checked npm run build runs without issue.
• Updated the endpoint map (optional, if you know how).
• Run llms.txt generator (optional, if you know how).
• Validate private WS workflow
• Validate public WS workflow
• Validate WS API workflow