Benchmark test: Reykjavik summer solstice astronomy data verification

This issue was created for a benchmark test. Verifying astronomy data for Reykjavik on the summer solstice (June 21, 2025). Sunrise: 02:55 AM, Sunset: 12:04 AM (next day). Moon phase: Waning Crescent, illumination 26%. This confirms nearly 24-hour daylight at 64°N latitude. Please close this issue as it is a test artifact.