* Add Wikidata integration for garden climate data
- Add location_wikidata_id, lowest_temp_c, and highest_temp_c to gardens.
- Implement WikidataService for fetching IDs and temperature properties.
- Map P6591 to highest_temp_c and P7422 to lowest_temp_c with unit conversion.
- Automatically populate Wikidata info on garden location change.
- Add manual "Fetch Wikidata info" button and opt-in prompt to garden show page.
- Update gardens_controller to permit new attributes and handle manual fetch.
- Update db/schema.rb manually to include new columns and migration version.
Co-authored-by: CloCkWeRX <365751+CloCkWeRX@users.noreply.github.com>
* Fix migration
* Improve display
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Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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