Prepare GeoIntel 1.0.0 release candidate

docs/API_CONTRACTS.md

@@ -55,7 +55,7 @@ Returns process liveness only. It never queries PostgreSQL.
 {
   "status": "ok",
   "service": "geointel-backend",
-  "version": "0.1.0",
+  "version": "1.0.0-rc.1",
   "build_sha": null,
   "build_time": null
 }
@@ -75,7 +75,7 @@ degraded. Docker uses `/health/ready`.
 {
   "status": "ok",
   "service": "geointel-backend",
-  "version": "0.1.0",
+  "version": "1.0.0-rc.1",
   "database": "ok",
   "postgis": "ok:3.x",
   "migration": "ok:202607160001",
@@ -105,7 +105,7 @@ envelope. PostGIS and configured YOLO state are derived at runtime.
     "sam": false,
     "grb": "bounded",
     "sentinel": "planned",
-    "version": "0.1.0",
+    "version": "1.0.0-rc.1",
     "build_sha": null,
     "providers": []
   }