refactor(mapillary): remove the plain-English query feature

Street Level is imagery only from here on: coverage, sequences and the
embedded viewer. The Claude planner, map-feature and traffic-sign tiles,
the NDJSON feature stream, sprites, detection outlines and analyst records
go, along with @anthropic-ai/sdk, zod and the Anthropic key entry.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

server/providers/mapillary.js

@@ -1,13 +1,11 @@
 import { installMapillaryRoutes } from './mapillary/routes.js';
 
 /**
- * Vite plugin: Mapillary street-level data.
+ * Vite plugin: Mapillary street-level coverage.
  *
- * Serves cached vector tiles (coverage, point features, traffic signs) with
- * the Mapillary token added server-side, fans a city-sized bbox out over
- * z14 feature tiles as an NDJSON stream, turns natural-language requests
- * into query plans with Claude (ANTHROPIC_API_KEY stays on this machine),
- * and proxies the MIT-licensed Mapillary sprite icons.
+ * Serves cached coverage vector tiles with the Mapillary token added
+ * server-side (and the unused z14 image point layer stripped in transit),
+ * plus a status route that says whether a token is configured.
  */
 function mapillaryProxy() {
   return {