Improve AI garrisons, player recovery and mission administration

tests/test_site_discovery_policy.py

@@ -6,7 +6,7 @@ methods = '\n'.join(body(source, sig) for sig in (
     'static float RadioRadiusLimit(', 'static bool ValidRadius(', 'static bool InRange('
 )).replace('ERR_LocationKind.', 'ERR_LocationKind::')
 run('''#include <cassert>
-enum class ERR_LocationKind { PRISON, RADIO, EXTRACTION, OUTPOST, DEPOT, MORTAR };
+enum class ERR_LocationKind { PRISON, RADIO, EXTRACTION, OUTPOST, DEPOT, MORTAR, HOSPITAL };
 ''' + methods.replace('int kind,', 'ERR_LocationKind kind,') + '''
 int main() {
  using K=ERR_LocationKind;