fix(cookeio,linkedin): accept spaces in cookie values, redact secrets in logs
- Accept spaces in cookie values to handle real-world servers like LinkedIn
that send "delete me" cookie values for session expiration (RFC 6265 is
overly strict here; browsers accept spaces)
- Redact cookie values in all log output across cookeio, cookeio_jar, and
requests to prevent leaking session tokens
- Add browser-like headers to LinkedIn API client (accept, accept-language,
x-li-track) matching other LinkedIn API libraries
- Catch Too_many_redirects in LinkedIn client with actionable error message
- Reduce max_redirects to 5 for LinkedIn API calls