refactor: complete module-driven architecture migration

This commit completes the migration to a fully module-driven architecture:

## Models Migration
- Moved all domain models from models/database/ to their respective modules:
  - tenancy: User, Admin, Vendor, Company, Platform, VendorDomain, etc.
  - cms: MediaFile, VendorTheme
  - messaging: Email, VendorEmailSettings, VendorEmailTemplate
  - core: AdminMenuConfig
- models/database/ now only contains Base and TimestampMixin (infrastructure)

## Schemas Migration
- Moved all domain schemas from models/schema/ to their respective modules:
  - tenancy: company, vendor, admin, team, vendor_domain
  - cms: media, image, vendor_theme
  - messaging: email
- models/schema/ now only contains base.py and auth.py (infrastructure)

## Routes Migration
- Moved admin routes from app/api/v1/admin/ to modules:
  - menu_config.py -> core module
  - modules.py -> tenancy module
  - module_config.py -> tenancy module
- app/api/v1/admin/ now only aggregates auto-discovered module routes

## Menu System
- Implemented module-driven menu system with MenuDiscoveryService
- Extended FrontendType enum: PLATFORM, ADMIN, VENDOR, STOREFRONT
- Added MenuItemDefinition and MenuSectionDefinition dataclasses
- Each module now defines its own menu items in definition.py
- MenuService integrates with MenuDiscoveryService for template rendering

## Documentation
- Updated docs/architecture/models-structure.md
- Updated docs/architecture/menu-management.md
- Updated architecture validation rules for new exceptions

## Architecture Validation
- Updated MOD-019 rule to allow base.py in models/schema/
- Created core module exceptions.py and schemas/ directory
- All validation errors resolved (only warnings remain)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/modules/monitoring/routes/api/admin_audit.py

@@ -18,7 +18,7 @@ from app.api.deps import get_current_admin_api
 from app.core.database import get_db
 from app.modules.monitoring.services.admin_audit_service import admin_audit_service
 from models.schema.auth import UserContext
-from models.schema.admin import (
+from app.modules.tenancy.schemas.admin import (
     AdminAuditLogFilters,
     AdminAuditLogListResponse,
     AdminAuditLogResponse,

app/modules/monitoring/routes/api/admin_logs.py

@@ -24,7 +24,7 @@ from app.modules.monitoring.services.admin_audit_service import admin_audit_serv
 from app.modules.core.services.admin_settings_service import admin_settings_service
 from app.modules.monitoring.services.log_service import log_service
 from models.schema.auth import UserContext
-from models.schema.admin import (
+from app.modules.tenancy.schemas.admin import (
     ApplicationLogFilters,
     ApplicationLogListResponse,
     FileLogResponse,
@@ -280,7 +280,7 @@ def update_log_settings(
     Changes are applied immediately without restart (for log level).
     File rotation settings require restart.
     """
-    from models.schema.admin import AdminSettingUpdate
+    from app.modules.tenancy.schemas.admin import AdminSettingUpdate
 
     updated = []
 

app/modules/monitoring/routes/pages/admin.py

@@ -14,8 +14,8 @@ from sqlalchemy.orm import Session
 from app.api.deps import get_db, require_menu_access
 from app.modules.core.utils.page_context import get_admin_context
 from app.templates_config import templates
-from models.database.admin_menu_config import FrontendType
-from models.database.user import User
+from app.modules.enums import FrontendType
+from app.modules.tenancy.models import User
 
 router = APIRouter()