Added a location block to the data package

docs/internal/prompt-input.md

@@ -18,8 +18,8 @@ Outputs:
 
 - `promptinput.Package` containing schema version, RunID, report metadata,
   briefing content, Recent Changes, and source warnings. Briefing content
-  includes discussion key messages and short/long-term AFD narratives when the
-  Weather API provides them.
+  includes configured location context, discussion key messages, and
+  short/long-term AFD narratives when the Weather API provides them.
 - optional JSON file written by `promptinput.Save`
 
 ## Boundaries
@@ -30,8 +30,8 @@ Outputs:
 
 ## Config Fields Used
 
-None directly. Config-derived values are already present in briefing metadata
-before this package runs.
+None directly. Config-derived values, including prompt location context, are
+already present in briefing metadata before this package runs.
 
 ## External Adapters Used