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

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

feat: Display sunshine duration in hours for monthly resolution in the hovertemplate.

feat: Hide Plotly logo and refine plot layout parameters including margins and x-axis title specification.

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

improve plot missing 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.

feat: Add snow depth/water equivalent and soil temperature profile plots, and integrate them into the UI.

feat: add single-panel overview plots for temperature, humidity, wind, and pressure to the DWD Shiny app.

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