Real-profile browsing and cron's per-job toolsets are both documented, but
nothing connected them: browser.md never mentioned scheduled runs and cron.md
never mentioned login state, so the constraints of driving a login-gated site
from a cron job were only discoverable in source.
Adds a Scheduled and unattended runs subsection to the real-profile section:
the browser.use_real_profile prerequisite (off by default), the credentials a
login form or a fresh 2FA challenge needs saved ahead of time, the auth re-sync
behaviour and its Windows consequence. Plus a pointer from cron.md's toolset
section.
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