Merge feat/voice-geometry onto main

Both stack parents (#837, #842) are on main, so the voice geometry branch
now builds on main directly. Conflict resolutions keep main's behaviour and
add the geometry work on top: osm_query gating on every provider, restored
admin identity for Nominatim outlines, merged analyst follow-up memory, and
the cancelled Globe View reset instruction ahead of the generic cancellation.

.env.example

@@ -263,6 +263,7 @@ AISSTREAM_API_KEY=
 # CCTV_FORCE_AUSTIN=                                   # force live default sources when a source-pack JSON is configured
 
 # Optional: comma-separated Overpass URLs; use only instances you run or pay for.
+# Also enables voice place search (osm_query, "hospitals in Kathmandu").
 OVERPASS_UPSTREAMS=
 
 # Optional: place-lookup endpoints. Lookups try bundled data first, then the