Rename ship/station scrap drop entities to "debris"

src/lib/ecs/system/ShipSystem.cpp

@@ -96,7 +96,7 @@ entt::entity ShipSystem::spawn(const std::string& schematicId,
         layout.has_value() ? layout->placedModules : def->defaultModules;
 
     // Derive the scrap dropped on destruction from the ship's as-built threat cost
-    // (REQ-RES-SCRAP-DROP): round(threat * scrap_per_threat), floored at 1 for any
+    // (REQ-RES-DEBRIS-DROP): round(threat * scrap_per_threat), floored at 1 for any
     // ship with threat > 0. Computed once here since threat is level-independent.
     const double threatCost = calculateShipThreatCost(m_config.threatCosts, m_config,
                                                       schematicId, modules);
@@ -392,7 +392,7 @@ entt::entity ShipSystem::spawn(const std::string& schematicId,
         }
 
         SalvageScrapBehavior salvage;
-        salvage.scrapTarget              = std::nullopt;
+        salvage.debrisTarget              = std::nullopt;
         salvage.maxCollectionRange_tiles = maxCollRange;
         salvage.orbitRadius_tiles =
             maxCollRange * static_cast<float>(m_config.world.orbitFactor);