fix: limit dispatch vehicles to 15 and 30 pallets

lastleg-service/src/main/java/com/baiyue/lastleg/dispatch/dto/DispatchRequests.java

@@ -39,7 +39,7 @@ public final class DispatchRequests {
         public DraftPallet(Long planPalletId, String draftToken) { this(planPalletId, draftToken, null); }
     }
 
-    public record DraftContainer(@NotBlank @Size(max = 64) String draftToken, @NotNull @Min(1) @Max(500) Integer capacity) {}
+    public record DraftContainer(@NotBlank @Size(max = 64) String draftToken, @NotNull Integer capacity) {}
 
     public record DraftRelease(@NotBlank @Size(max = 64) String draftToken) {
     }

lastleg-service/src/main/java/com/baiyue/lastleg/dispatch/service/DispatchService.java

@@ -123,6 +123,9 @@ public class DispatchService {
 
     @Transactional
     public DispatchContainerResponse createDraftContainer(String operatorId, DispatchRequests.DraftContainer request) {
+        if (!Set.of(15, 30).contains(request.capacity())) {
+            throw new ResponseStatusException(HttpStatus.CONFLICT, "车辆大小仅支持15托或30托");
+        }
         DispatchDraft draft = ensureDraft(operatorId, request.draftToken());
         int next = draftContainers.findByToken(request.draftToken()).stream().mapToInt(DispatchDraftContainer::getSequenceNo).max().orElse(0) + 1;
         DispatchDraftContainer c = new DispatchDraftContainer(); c.setId(IdWorker.getId()); c.setDraftId(draft.getId()); c.setDraftToken(request.draftToken()); c.setSequenceNo(next); c.setCapacity(request.capacity()); c.setCreatedAt(LocalDateTime.now()); c.setUpdatedAt(LocalDateTime.now()); draftContainers.insert(c);