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

core/app.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package core
 
 import (

core/app_test.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package core_test
 
 import (

core/container.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 // Package core provides the micro-kernel service bus, generic IoC container, and runtime extensions.
 package core
 

core/context.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package core
 
 import (

core/context_test.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package core_test
 
 import (

core/contracts/auth.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 // Package contracts defines unified service interfaces and DTOs for cross-plugin communication.
 package contracts
 
@@ -26,6 +29,11 @@ type UserDTO struct {
 	UpdatedAt          time.Time `json:"updated_at"`
 }
 
+// TableName returns w_users.
+func (UserDTO) TableName() string {
+	return "w_users"
+}
+
 // OAuthUserInfoDTO contains user identity claims obtained from an OAuth provider.
 type OAuthUserInfoDTO struct {
 	ID                uint64 `json:"id"`

core/contracts/cache.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 // Package contracts defines unified service interfaces and DTOs for cross-plugin communication.
 package contracts
 

core/contracts/database.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 // Package contracts defines unified service interfaces and DTOs for cross-plugin communication.
 package contracts
 

core/contracts/events.go

@@ -0,0 +1,13 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package contracts
+
+// EventTopicAdminLoggedIn 管理员登录事件主题
+const EventTopicAdminLoggedIn = "admin:logged_in"
+
+// AdminLoggedIn 管理员登录领域事件载荷
+type AdminLoggedIn struct {
+	User *UserDTO `json:"user"`
+	IP   string   `json:"ip"`
+}

core/contracts/logger.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 // Package contracts defines unified service interfaces and DTOs for cross-plugin communication.
 package contracts
 

core/contracts/storage.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 // Package contracts defines unified service interfaces and DTOs for cross-plugin communication.
 package contracts
 

core/contracts/user.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 // Package contracts defines unified service interfaces and DTOs for cross-plugin communication.
 package contracts
 
@@ -60,4 +63,22 @@ type UserService interface {
 
 	// SetUserAdmin sets the admin role status for a user.
 	SetUserAdmin(ctx context.Context, id uint64, admin bool) error
+
+	// VerifyAccessToken verifies an access token hash and returns the user DTO and isAdmin flag.
+	VerifyAccessToken(ctx context.Context, tokenHash string) (*UserDTO, bool, error)
+
+	// DeleteUser removes a user and related access tokens.
+	DeleteUser(ctx context.Context, id uint64) error
+
+	// CountUsers returns total user count.
+	CountUsers(ctx context.Context) (int64, error)
+
+	// CountActiveUsers returns active user count.
+	CountActiveUsers(ctx context.Context) (int64, error)
+
+	// GetFirstAdminUser returns the earliest admin user.
+	GetFirstAdminUser(ctx context.Context) (*UserDTO, error)
+
+	// UniqueUsername generates a unique username candidate based on base.
+	UniqueUsername(ctx context.Context, base string) (string, error)
 }

core/events.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package core
 
 import (

core/events_test.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package core_test
 
 import (

core/extpoints/extpoints_test.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package extpoints_test
 
 import (

core/extpoints/migration.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 // Package extpoints defines extension points for router, migrations, tasks, schedules, and settings.
 package extpoints
 

core/extpoints/router.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package extpoints
 
 import (

core/extpoints/schedule.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package extpoints
 
 import "sync"

core/extpoints/setting.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package extpoints
 
 import "sync"

core/extpoints/task.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package extpoints
 
 import (

core/manifest.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package core
 
 import (

core/types.go

@@ -1,3 +1,6 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
 package core
 
 import (