Open-Meteo Historical Fetch

Core Goal

• Fetch historical Open-Meteo archive data for one or more coordinates in one invocation.
• Support inclusive start_date and end_date windows.
• Return machine-readable JSON with request metadata, transport info, validation summary, and normalized records.
• Keep runtime observable with structured logs and optional log file output.

Required Environment

• Configure runtime by environment variables (see references/env.md).
• Start from assets/config.example.env.
• Load env values before running commands:

set -a
source assets/config.example.env
set +a