throw if modules are referenced that don't exist in config

src/lib/ecs/system/ShipSystem.cpp

@@ -2,6 +2,7 @@
 
 #include <cassert>
 #include <map>
+#include <stdexcept>
 #include <utility>
 #include <vector>
 
@@ -102,7 +103,7 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
     for (const PlacedModule& pm : modules)
     {
         const ModuleDef* modDef = findModuleDef(pm.moduleId);
-        if (!modDef) { continue; }
+        if (!modDef) { throw std::runtime_error("unknown module id '" + pm.moduleId + "'"); }
 
         const double mx = static_cast<double>(modDef->playerProductionLevel);
 
@@ -173,7 +174,7 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
     for (const PlacedModule& pm : modules)
     {
         const ModuleDef* modDef = findModuleDef(pm.moduleId);
-        if (!modDef) { continue; }
+        if (!modDef) { throw std::runtime_error("unknown module id '" + pm.moduleId + "'"); }
 
         const double mx = static_cast<double>(modDef->playerProductionLevel);