fix: ticket category check constraint + employee access to projects/dispatches

backend/src/main/java/com/srsystem/controller/DispatchHistoryController.java

@@ -48,7 +48,7 @@ public class DispatchHistoryController {
     }
 
     @Operation(summary = "현재 파견 중인 직원 목록", description = "파견중인 직원 목록을 조회합니다")
-    @PreAuthorize("hasAnyRole('MANAGER', 'ADMIN')")
+    @PreAuthorize("hasAnyRole('EMPLOYEE', 'MANAGER', 'ADMIN')")
     @GetMapping("/active")
     public ResponseEntity<ApiResponse<List<DispatchHistory>>> getActiveDispatches() {
         List<DispatchHistory> list = dispatchHistoryService.getActiveDispatches();

backend/src/main/java/com/srsystem/controller/ProjectController.java

@@ -45,7 +45,7 @@ public class ProjectController {
     }
 
     @Operation(summary = "프로젝트 목록 조회", description = "전체 프로젝트 목록을 조회합니다. 상태 필터 옵션 포함")
-    @PreAuthorize("hasAnyRole('MANAGER', 'ADMIN')")
+    @PreAuthorize("hasAnyRole('EMPLOYEE', 'MANAGER', 'ADMIN')")
     @Transactional(readOnly = true)
     @GetMapping
     public ResponseEntity<ApiResponse<List<Project>>> findAll(

backend/src/main/resources/db/migration/V20__fix_ticket_category_check.sql

@@ -0,0 +1,3 @@
+ALTER TABLE tb_ticket DROP CONSTRAINT IF EXISTS tb_ticket_category_check;
+ALTER TABLE tb_ticket ADD CONSTRAINT tb_ticket_category_check
+    CHECK (category IN ('BUG', 'FEATURE', 'SUPPORT', 'QA', 'VACATION', 'EXPENSE', 'EQUIPMENT_REQUEST', 'GENERAL'));