fix(northernlights): adapt to NOAA JSON API changes

[objectivelabs]

NOAA SWPC products now return object-shaped JSON (Kp, proton_speed, bz_gsm) instead of legacy table/dict shapes; parsing caused a runtime error and blank previews. Use explicit User-Agent, http TTL cache, resilient parsers with legacy fallbacks, optional marquee only for active ALERT/WARNING/WATCH, and clarify manifest description copy.

[tidbyt]

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