feat: Add 10-minute DWD data resolution and parallelize granular metadata updates.

feat: Implement granular DWD parameter metadata extraction and caching, add `soil_temp_min_5cm` parameter, fix "ghost pressure" data, and enhance map highlighting flexibility.

refactor: Streamline DWD data processing by selectively unzipping data files and enhancing download performance through the removal of a blocking size check, larger download chunks, and dynamic total size detection.

perf: Optimize DWD data parsing by switching to `data.table::fread` with string-based date pre-filtering and consolidate library imports.

feat: Apply date range filtering to DWD index file selection and parsed dataframes for improved data loading.

feat: Add ISO-8559-1 encoding to CSV parsing and explicitly return NULL on parsing errors.

feat: Use readr for faster DWD data parsing and enhance chunked download logic to handle unknown file sizes and various HTTP response codes.

feat: Add support for new weather parameters including dew point, humidity, visibility, and detailed cloud layer data.

feat: Add monthly average min/max temperature and snow sum variables, update date range constraints and defaults for monthly resolution, and enhance temperature plot visualization with tiered bands.

feat: Add monthly data resolution support across UI, data fetching, parsing, and plotting, and set daily as the default resolution.

refactor: Consolidate map station highlighting into a new helper function, update helper sourcing, and fix map rendering on tab switch.