Use stealth HTTP client as default for all DevPlace requests except Playwright

Summary

Replace the default HTTP client with a stealth HTTP client for all HTTP requests within the DevPlace project, except where Playwright is explicitly used. This applies to deepsearch, SEO, and all other components.

Steps to Reproduce

Not provided.

Expected Behaviour

All HTTP requests (deepsearch, SEO, etc.) use a stealth HTTP client by default, except those made via Playwright.

Actual Behaviour

The default HTTP client is not stealth; Playwright is the only exception noted.

Environment

Not provided.

Reported by retoor via DevPlace.