Scope: Hong Kong public datasets and government data.
Fetch HKO astronomy / tide data (yearly · tide-station specific).
Args: dataType: SRS → sunrise / transit / sunset (needs year=) MRS → moonrise / transit / moonset (needs year=) HHOT → hourly tide heights (needs year= + month= + station=) year: 4-digit year (e.g. 2026). month: 1-12 · required for HHOT. station: tide station code · required for HHOT (CCH=Cheung Chau, KLW=Ko Lau Wan, LOP=Lok On Pai, MWC=Ma Wan, QUB=Quarry Bay, SPW=Shek Pik, TAP=Tai Po Kau, TBT=Tsim Bei Tsui, TMW=Tai Miu Wan, WAG=Waglan Island). lang: "en" | "tc" | "sc"
Returns raw JSON or {"format": "csv", "text": ...} for CSV responses.