Biomekka 1.8.40 - Trickle 5s hard schedule

Changes:
- Changed ESP-owned trickle bar pulse from 30 seconds to 5 seconds.
- Kept the existing 3 minute cycle interval unchanged.
- Kept trickle scheduling unconditional: no humidity, storm, quiet-mode, door-open, lighting, rain, mist, spray, or manual-output lockouts can block it.
- Updated build/version strings, boot log, serial help, and auto-stop reason text so diagnostics match the actual behaviour.

Notes:
- Goblin firmware must still support TRICKLE:ON and TRICKLE:OFF on D10.
- Main ESP remains the schedule owner. Goblin only switches the relay.