refactor(P6): standardize route variable naming to router

All route files (admin.py, store.py) now export `router` instead of
`admin_router`/`store_router`. Consumer code (definition.py, __init__.py)
imports as `router as admin_router` where distinction is needed.
ModuleDefinition fields remain admin_router/store_router.

64 files changed across all modules. Architecture rules, docs, and
migration plan updated. Added noqa:API001 support to validator for
pre-existing raw dict endpoints now visible with standardized router name.
All 1114 tests pass.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/customers/routes/api/store.py

@@ -25,14 +25,14 @@ from app.modules.enums import FrontendType
 from app.modules.tenancy.schemas.auth import UserContext
 
 # Create module-aware router
-store_router = APIRouter(
+router = APIRouter(
     prefix="/customers",
     dependencies=[Depends(require_module_access("customers", FrontendType.STORE))],
 )
 logger = logging.getLogger(__name__)
 
 
-@store_router.get("", response_model=StoreCustomerListResponse)
+@router.get("", response_model=StoreCustomerListResponse)
 def get_store_customers(
     skip: int = Query(0, ge=0),
     limit: int = Query(100, ge=1, le=1000),
@@ -66,7 +66,7 @@ def get_store_customers(
     )
 
 
-@store_router.get("/{customer_id}", response_model=CustomerDetailResponse)
+@router.get("/{customer_id}", response_model=CustomerDetailResponse)
 def get_customer_details(
     customer_id: int,
     current_user: UserContext = Depends(get_current_store_api),
@@ -101,7 +101,7 @@ def get_customer_details(
     )
 
 
-@store_router.put("/{customer_id}", response_model=CustomerMessageResponse)
+@router.put("/{customer_id}", response_model=CustomerMessageResponse)
 def update_customer(
     customer_id: int,
     customer_data: CustomerUpdate,
@@ -127,7 +127,7 @@ def update_customer(
     return CustomerMessageResponse(message="Customer updated successfully")
 
 
-@store_router.put("/{customer_id}/status", response_model=CustomerMessageResponse)
+@router.put("/{customer_id}/status", response_model=CustomerMessageResponse)
 def toggle_customer_status(
     customer_id: int,
     current_user: UserContext = Depends(get_current_store_api),