* feat(geodata): add standard source presets
Expose the existing geofile allowlist to the Geodata editor so administrators can configure the supported scheduled downloads without copying URLs manually
Tested with npm run test, npm run lint, npm run typecheck, npm run format:check, and go test ./internal/web/service ./internal/web/controller -run '^(TestStandardGeodataSources|TestGeodata)' -count=1
Assisted-by: OpenCode:openai/gpt-5.6-terra (mostly)
* fix(geodata): preserve custom source entries
Add missing standard sources instead of replacing existing custom entries.
Assisted-by: OpenCode:openai/gpt-5.6-terra (mostly)