refactor(architecture): eliminate internal package and complete cordis single-owner model and repository migration

- Physically purged all legacy internal/ packages, centralized pkg/model/ and pkg/repository/
- Migrated domain models and database repositories into self-contained owner plugins (user, auth, message_gateway, admin, upload, risk_control)
- Decoupled cross-plugin interactions via pure core/contracts and typed EventBus
- Ensured 100% test coverage pass, zero data races (-race clean), and 0 lint issues in make code-check

pkg/task/task_repo.go

@@ -0,0 +1,125 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package task
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+
+	db "github.com/Rain-kl/Wavelet/pkg/persistence"
+	"github.com/Rain-kl/Wavelet/pkg/persistence/idgen"
+)
+
+const (
+	taskExecutionLogRedisKeyPrefix = "task:execution:log:"
+	taskExecutionLogExpiration     = 24 * time.Hour
+	taskExecutionLogMaxLines       = 1000
+)
+
+func taskExecutionLogRedisKey(taskID string) string {
+	return db.PrefixedKey(taskExecutionLogRedisKeyPrefix + taskID)
+}
+
+func createTaskExecution(ctx context.Context, execution *TaskExecution) error {
+	if execution.ID == 0 {
+		execution.ID = idgen.NextUint64ID()
+	}
+	return db.DB(ctx).Create(execution).Error
+}
+
+func updateTaskExecution(ctx context.Context, execution *TaskExecution) error {
+	return db.DB(ctx).Omit("log").Save(execution).Error
+}
+
+func getTaskExecutionByID(ctx context.Context, id uint64) (*TaskExecution, error) {
+	var execution TaskExecution
+	if err := db.DB(ctx).Where("id = ?", id).First(&execution).Error; err != nil {
+		return nil, err
+	}
+	_ = loadTaskExecutionLog(ctx, &execution)
+	return &execution, nil
+}
+
+func getTaskExecutionByTaskID(ctx context.Context, taskID string) (*TaskExecution, error) {
+	var execution TaskExecution
+	if err := db.DB(ctx).Where("task_id = ?", taskID).First(&execution).Error; err != nil {
+		return nil, err
+	}
+	_ = loadTaskExecutionLog(ctx, &execution)
+	return &execution, nil
+}
+
+func appendTaskExecutionLog(ctx context.Context, taskID string, logLine string) error {
+	if db.Redis == nil {
+		return errors.New("redis client is not initialized")
+	}
+
+	now := time.Now().Format("15:04:05")
+	line := fmt.Sprintf("[%s] %s\n", now, logLine)
+	key := taskExecutionLogRedisKey(taskID)
+
+	_, err := db.Redis.TxPipelined(ctx, func(pipe redis.Pipeliner) error {
+		pipe.RPush(ctx, key, line)
+		pipe.LTrim(ctx, key, -taskExecutionLogMaxLines, -1)
+		pipe.Expire(ctx, key, taskExecutionLogExpiration)
+		return nil
+	})
+	if err != nil {
+		return fmt.Errorf("append task execution log to redis: %w", err)
+	}
+	return nil
+}
+
+func flushTaskExecutionLog(ctx context.Context, taskID string) error {
+	if db.Redis == nil {
+		return errors.New("redis client is not initialized")
+	}
+
+	key := taskExecutionLogRedisKey(taskID)
+	logLines, err := db.Redis.LRange(ctx, key, 0, -1).Result()
+	if err != nil {
+		return fmt.Errorf("get task execution log from redis: %w", err)
+	}
+	if len(logLines) == 0 {
+		return nil
+	}
+	logText := strings.Join(logLines, "")
+
+	result := db.DB(ctx).Model(&TaskExecution{}).
+		Where("task_id = ?", taskID).
+		Update("log", logText)
+	if result.Error != nil {
+		return fmt.Errorf("persist task execution log: %w", result.Error)
+	}
+	if result.RowsAffected == 0 {
+		return fmt.Errorf("persist task execution log: task %q not found", taskID)
+	}
+
+	if err := db.Redis.Del(ctx, key).Err(); err != nil {
+		return fmt.Errorf("delete persisted task execution log from redis: %w", err)
+	}
+	return nil
+}
+
+func loadTaskExecutionLog(ctx context.Context, execution *TaskExecution) error {
+	if db.Redis == nil {
+		return nil
+	}
+
+	logLines, err := db.Redis.LRange(ctx, taskExecutionLogRedisKey(execution.TaskID), 0, -1).Result()
+	if err != nil {
+		return fmt.Errorf("get task execution log from redis: %w", err)
+	}
+	if len(logLines) == 0 {
+		return nil
+	}
+
+	execution.Log = strings.Join(logLines, "")
+	return nil
+}