fix: carry weather and fire freshness into tool answers

get_weather dropped the proxy's stale status and get_active_fires dropped
FIRMS staleness and failed satellite sources, so answers and the HUD caption
read them as current. Both now report them, and the caption context marks
such sections stale or degraded.

src/tools/queries/hazards.js

@@ -78,9 +78,24 @@ export const getActiveFires = defineTool({
       .filter((fire) => areaContains(area, fire))
       .sort((a, b) => (b.frp ?? 0) - (a.frp ?? 0));
     const result = capRows(fires, args.limit);
+    // The proxy serves its last good snapshot when a refresh fails, and marks
+    // satellites whose download failed.
+    const stale = snapshot.stale === true;
+    const missing = (snapshot.sources || [])
+      .filter((source) => source?.ok === false)
+      .map((source) => source.source);
+    const notes = [
+      ...(stale ? ['data may be stale'] : []),
+      ...(missing.length ? [`no data from ${missing.join(', ')}`] : []),
+    ];
     return {
-      summary: `${countNoun(fires.length, 'fire detection')} in ${area.label} in the last 24 hours.`,
+      summary:
+        `${countNoun(fires.length, 'fire detection')} in ${area.label} in the last 24 hours` +
+        (notes.length ? ` (${notes.join('; ')}).` : '.'),
       data: {
+        stale,
+        missing_sources: missing,
+        fetched_at: isoTime(snapshot.fetchedAt),
         ...result,
         rows: result.rows.map((fire) => ({
           lat: fire.lat,