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/storage/storage_ops.go

@@ -5,10 +5,12 @@ package storage
 
 import (
 	"context"
+	"errors"
 
+	"Wavelet/core/contracts"
 	"Wavelet/pkg/logger"
 	"Wavelet/plugins/domain/upload/models"
-	"Wavelet/plugins/infra/storage/objectstore"
+	"Wavelet/plugins/domain/upload/shared"
 )
 
 // ReadOnly checks if the storage system is in read-only maintenance mode.
@@ -22,10 +24,10 @@ func ReadOnly(ctx context.Context) bool {
 }
 
 // OpenStoredObject opens a stored upload object from the active storage backend.
-func OpenStoredObject(ctx context.Context, upload *models.Upload) (*objectstore.Object, error) {
-	_, backend, err := objectstore.Active(ctx)
-	if err != nil {
-		return nil, err
+func OpenStoredObject(ctx context.Context, upload *models.Upload) (*contracts.StorageObject, error) {
+	storageSvc := shared.GetStorage(ctx)
+	if storageSvc == nil {
+		return nil, errors.New("storage service not available")
 	}
-	return backend.Get(ctx, upload.FilePath)
+	return storageSvc.Get(ctx, upload.FilePath)
 }