### Problem

Crawlee currently crashes when importing cookies from Playwright due to unsupported fields like partitionKey and _crHasCrossSiteAncestor, which are Chromium-specific and not part of the standard cookie format.

Error:
TypeError: SessionCookies.set() got an unexpected keyword argument 'partitionKey'

## Root Cause

Recent versions of Playwright (especially with Chromium) include internal browser metadata fields in the cookie dictionary. Crawlee's SessionCookies.set() method does not accept these extra keys.

Affected fields:

• partitionKey
• _crHasCrossSiteAncestor

## Fix

Modified the set_cookies_from_playwright_format() method in sessions/_cookies.py to:

• Remove any field starting with _
• Explicitly remove partitionKey if present

This ensures compatibility and future-proofs against additional Chromium-internal fields.

cookie_param = {
    k: v for k, v in self._from_playwright(pw_cookie).items()
    if not k.startswith('_')
}
cookie_param.pop('partitionKey', None)
self.set(**cookie_param)

### Tests

Added a unit test in tests/unit/sessions/test_cookies.py to verify that cookies with unsupported fields are cleaned and do not raise exceptions when passed to set_cookies_from_playwright_format().

### Environment

• Crawlee version: 0.6.11
• Python version: 3.12
• OS: Windows 11
• Browser: Chromium via Playwright

### Related Issue
Closes #1333