fix: reclaim before accepting wrapped Vulkan iGPU memory estimates (#2124)

src/model_manager.h

@@ -152,6 +152,7 @@ private:
         size_t required_budget_bytes  = 0;
         size_t available_device_bytes = SIZE_MAX;
         size_t available_budget_bytes = SIZE_MAX;
+        bool requires_reclamation     = false;
         bool fits() const {
             return required_device_bytes <= available_device_bytes &&
                    required_budget_bytes <= available_budget_bytes;