feat: add complete astronomical data from Weatherstack API

Performance optimization: Added caching (24h loc, 5m weather) and connection pooling

fix: explicit environment variable loading for HF secrets

debug: add health check endpoint

fix: integrate dashboard into main.py and switch to single-port 7860 for HF

fix: remove unavailable software-properties-common from Dockerfile

deploy: add streamlit dashboard and hf spaces configuration

chore: add vercel.json for deployment

feat: complete air quality integration, remove moon phase, and secure api keys

first commit