…mate)

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

Removes the postinstall `npm update browserstack-node-sdk` (supply-chain /
install-time-execution vector that bypasses lockfile pinning). The
browserstack-node-sdk `latest` dependency already resolves to the current
SDK on `npm install`, so the postinstall was redundant.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

The BrowserStack Node SDK keys Playwright detection (__isPlaywrightInstalled)
on @playwright/test and patches THAT module's BrowserType. Importing the
standalone 'playwright' package left launch() unpatched. Resolves the
preInitialize compareVersions crash. (Live launch interception still under
review with the SDK team.)

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

…regression)

Verified live: with @playwright/test + sdk 1.49.3 the Playwright launch is
intercepted and BrowserStack sessions run (macOS/Chrome + Windows/Edge passed).
sdk 1.55.x regresses the launch patcher (throws 'session_' undefined -> silent
local-launch fallback). Aligned deps to the working reference (jest-js-pw):
@playwright/test 1.55.0, selenium-webdriver, jest 29.7.0, matching jest.config.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

…spatch)

…t GITHUB_TOKEN)