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/message_gateway/push_channels.go

@@ -11,10 +11,11 @@ import (
 	"strings"
 	"sync"
 
-	"Wavelet/pkg/response"
-	pkgpush "Wavelet/plugins/domain/message_gateway/push"
 	"github.com/gin-gonic/gin"
 	"gorm.io/gorm"
+
+	"Wavelet/pkg/response"
+	pkgpush "Wavelet/plugins/domain/message_gateway/push"
 )
 
 const (