whey: constrain whey-vpn-keepalive.timer to business hours (Mon-Fri daytime) per Elazar - convenience reconnect only

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Activity

• wi-cli-venus created · 2026-07-02
  parent=#1568
• wi-cli-venus completed · 2026-07-02
  timer rewritten to OnCalendar Mon-Fri 08-19h hourly + 30min jitter, Persistent dropped; verified next fire in-window