refactor(core): align with cordis spatiotemporal composability architecture

- Purify core micro-kernel by removing context hardcoded helpers and reverse dependencies
- Eliminate init() side effects in infra plugins with reversible lifecycle disposal
- Completely isolate plugins by removing cross-plugin imports and using core/contracts
- Introduce TaskService and RiskControlService contracts for unified cross-plugin APIs
- Regenerate Swagger documentation and update developer guide matrix
- Achieve 0 violations in check_cordis_architecture.sh and 100% test pass

backend/plugins/domain/upload/handler/routers.go

@@ -21,6 +21,9 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/gin-gonic/gin"
+	"gorm.io/gorm"
+
 	"Wavelet/core/contracts"
 	"Wavelet/pkg/logger"
 	"Wavelet/pkg/response"
@@ -31,8 +34,6 @@ import (
 	"Wavelet/plugins/domain/upload/shared"
 	uploadstorage "Wavelet/plugins/domain/upload/storage"
 	"Wavelet/plugins/domain/upload/util"
-	"github.com/gin-gonic/gin"
-	"gorm.io/gorm"
 )
 
 type batchDownloadRequest struct {