fix(persistence): migrate all pkg/persistence imports to plugins/infra/database and plugins/infra/cache

- Replace db.DB(ctx) with database.DB(ctx) from plugins/infra/database
- Replace db.Redis/db.PrefixedKey/db.GetJSON/db.SetJSON with cachepkg.* from plugins/infra/cache
- Replace pkg/persistence/idgen with pkg/idgen (already exists)
- Replace pkg/persistence/batchwriter with pkg/batchwriter (already exists)
- Replace pkg/persistence/migrator with pkg/migrator (already exists)
- Replace pkg/persistence/logstore with plugins/domain/risk_control/logstore
- Delete defunct pkg/{persistence,cap,message_gateway,push,shared,task}
- Fix vet issues: db alias in domain_test.go, driver_asynq_worker.TaskHandler reference
- Update Makefile architecture guard
- Update docs and skill references
- Update go.mod: gorilla/sessions promotion to direct dependency

plugins/domain/cap/runtime_settings.go

@@ -14,9 +14,9 @@ import (
 
 	"golang.org/x/sync/singleflight"
 
-	"github.com/Rain-kl/Wavelet/pkg/persistence"
-
 	"github.com/Rain-kl/Wavelet/pkg/util"
+	cachepkg "github.com/Rain-kl/Wavelet/plugins/infra/cache"
+	database "github.com/Rain-kl/Wavelet/plugins/infra/database"
 )
 
 const (
@@ -148,7 +148,7 @@ func loadRuntimeSettings(ctx context.Context) (RuntimeSettings, error) {
 		Value string `gorm:"column:value"`
 	}
 	var records []configRecord
-	if err := db.DB(ctx).Table("w_system_configs").Where("key IN ?", runtimeConfigKeys).Find(&records).Error; err != nil {
+	if err := database.DB(ctx).Table("w_system_configs").Where("key IN ?", runtimeConfigKeys).Find(&records).Error; err != nil {
 		return RuntimeSettings{}, err
 	}
 	configs := make(map[string]string, len(records))
@@ -209,7 +209,7 @@ func (s *runtimeSettingsStore) ensureInvalidationListener() {
 const SystemConfigInvalidationChannel = "system_config:invalidation"
 
 func startRuntimeSettingsInvalidationListener() {
-	rdb := db.Redis
+	rdb := cachepkg.Redis
 	if rdb == nil {
 		return
 	}