Document `mode: 'url'` for sqlite-geojson/sqlite-csv add-on resources in 13-resources.md: thin url+addon reference, single-fetch + in-memory, RES043/044/045 codes. Doc half of flowmcp-cli #64.
Document
mode: 'url'for sqlite-geojson/sqlite-csv add-on resources in 13-resources.md: thin url+addon reference, single-fetch + in-memory, RES043/044/045 codes. Doc half of flowmcp-cli #64.