[SDK-144] remove node-only unref() call

[lposen]

🔹 JIRA Ticket(s) if any

• SDK-144

✏️ Description

Removestimeout.unref(), which can only be used in nodejs.

[github-actions]

Lines	Statements	Branches	Functions
	50.85% (239/470)	24.48% (48/196)	44.58% (70/157)

[qltysh]

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Total Coverage: This PR will not change total coverage.

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[Copilot]

Pull Request Overview

Removes Node.js-specific timeout.unref() call to ensure cross-platform compatibility. The timeout mechanism for handling auth responses is simplified by removing the Node.js-only API call that prevented the process from being kept alive.

• Removed timeoutId variable and unref() call for platform compatibility
• Simplified timeout handling for auth responses

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