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/infra/database/postgres_logger_test.go

@@ -0,0 +1,39 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package database
+
+import (
+	"testing"
+
+	gormLogger "gorm.io/gorm/logger"
+)
+
+func TestParseLogLevel(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name            string
+		configuredLevel string
+		want            gormLogger.LogLevel
+	}{
+		{
+			name:            "debug enables SQL trace processing",
+			configuredLevel: "debug",
+			want:            gormLogger.Info,
+		},
+		{
+			name:            "development preserves configured level",
+			configuredLevel: "warn",
+			want:            gormLogger.Warn,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := parseLogLevel(tt.configuredLevel); got != tt.want {
+				t.Fatalf("parseLogLevel() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}