Configure Git LFS for data folder

docs: update metadata regeneration paths and directory references in URL_ARCHITECTURE.md

fix: update decode helper to handle plus signs as spaces in query parameters

fix: handle empty state selection in server logic when input is not null

refactor: restrict state filter to single-selection mode and update server logic accordingly

chore: remove temporary DWD documentation files from sync directory

delete dwd....

docs: correct slugify details and expand metadata structure in URL_ARCHITECTURE.md

fix: clear station and switch to map when state filter changes

docs: add URL architecture reference for clean URL implementation

fix: broadcast when state filter is cleared (ignoreNULL=FALSE)

fix: pre-consume initial_resolution_set guard and re-add resolution broadcast

fix: remove resolution broadcast to eliminate stale count flash

fix: revert skip_context, always include context in broadcasts

fix: skip context counts in resolution broadcast to avoid stale data

fix: apply resolution-specific date defaults on initial load

fix: restore resolution-specific date windows in SEO export script

fix: correct missing closing brace in server.R URL handler

data: refresh all station caches and file indexes from DWD

fix: revert resolution-specific init dates, use uniform 6-year window

data: refresh base station metadata from DWD

fix: apply resolution-specific date range on initial URL load without explicit dates

fix: restore per-resolution date ranges in export script

fix: use two-way date overlap for active station count (matches Shiny)

fix: align export active count with Shiny default date range (6 years)

feat: include activeStationCount in resolution-level SEO metadata

feat: add active count to country-level context

fix: prevent initial map zoom overriding state/station zoom

fix: allow map to zoom to state bounds on initial URL load

feat: add country-level fallback context when state is cleared

feat: include station list in state broadcast for expandable details block

feat: send both total and active station counts for state context

feat: send stateStationCount in broadcast_state for rich state-level context

fix: override URL dates when station is historical and has no data in requested range

fix: remove debug messages from deep-link auto-adjust

fix: ensure deep-link observer runs before resolution observer

fix: prevent resolution observer from clobbering auto-adjusted dates

fix: provide fallback current_start if date_range input is not initialized yet

fix: align activeStationCount with Shiny app default date filters

feat: auto-adjust date range for historical stations and compute activeStationCount

fix: add state_selector observer to trigger URL update when state is selected

fix: forward rich metadata fields in postMessage payload

feat: broadcast full station metadata to parent window for rich SEO text generation

fix: provide choices in updateSelectizeInput to prevent 500 error on server=TRUE

fix: resolve 500 error on station selector endpoint caused by length zero existing selection

fix: ensure station selection from URL persists by decoupling application from choice stabilization

feat: add case-insensitive and slug-based matching for stations and states in URL parameters

feat: add DWD station SEO metadata and script to export data

feat: add descriptive tooltips to UI filter inputs for improved user guidance

Revert "chore: optimize Docker image size and update R package dependencies"