BioMekka 1.8.34
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Storm atmosphere update based on 1.8.33.

Changed
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- Pre-storm build-up duration is now randomly selected from 3 to 15 minutes.
- The matching post-storm lighting recovery uses the exact same randomly selected duration.
- Full storm duration remains independently random from 3 to 15 minutes for automatic storms.
- Pre-storm fog changed from 20s ON / 40s OFF to 175s ON / 5s OFF while below the existing humidity target. This is deliberately nearly 3x the former fog duty cycle.
- Existing pre-storm humidity guards remain unchanged: target 78% RH and hard stop 82% RH.
- During pre-storm only, the main circulation fan now rises linearly from 10% to 55%.
- The small exhaust fan and demist fan remain OFF during pre-storm so the added fog is moved around the habitat rather than extracted.
- Dashboard JSON now exposes storm_transition_ms and prestorm_wind_pct.

Not changed
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- Pins, relays, Goblin commands, MQTT topics, normal humidity control, storm rain timings, storm chance, full-storm wind randomness, normal lighting colours, quiet-night ban, dashboard layout, solar schedule, thermal controller, Agent DVR trigger timing, or networking.