shift vendor.py to use new api style

src/middlewared/middlewared/api/v25_04_0/__init__.py

@@ -1,3 +1,4 @@
 from .cloud_sync import *  # noqa
 from .common import *  # noqa
 from .user import *  # noqa
+from .vendor import *  # noqa

src/middlewared/middlewared/api/v25_04_0/common.py

@@ -2,7 +2,7 @@
 
 from middlewared.api.base import BaseModel
 
-__all__ = ["QueryOptions", "QueryArgs"]
+__all__ = ["QueryOptions", "QueryArgs", "NoArgs", "NoneReturn"]
 
 
 class QueryOptions(BaseModel):
@@ -23,3 +23,11 @@ class QueryOptions(BaseModel):
 class QueryArgs(BaseModel):
     filters: list[Any] = []  # FIXME: Add validation here
     options: QueryOptions = QueryOptions()
+
+
+class NoArgs(BaseModel):
+    pass
+
+
+class NoneReturn(BaseModel):
+    result: None

src/middlewared/middlewared/api/v25_04_0/vendor.py

@@ -0,0 +1,5 @@
+from middlewared.api.base import BaseModel
+
+
+class VendorNameResult(BaseModel):
+    result: str | None

src/middlewared/middlewared/plugins/system/vendor/vendor.py

@@ -1,14 +1,16 @@
 import os
 
-from middlewared.service import private, Service
+from middlewared.api import api_method
+from middlewared.api.current import NoArgs, NoneReturn, VendorNameResult
+from middlewared.service import Service
 
 
 SENTINEL_FILE_PATH = '/data/.vendor'
 
 
 class VendorService(Service):
 
-    @private
+    @api_method(NoArgs, VendorNameResult, private=True)
     def name(self) -> str | None:
         try:
             with open(SENTINEL_FILE_PATH, 'r') as file:
@@ -17,7 +19,7 @@ def name(self) -> str | None:
         except FileNotFoundError:
             return None
 
-    @private
+    @api_method(NoArgs, NoneReturn, private=True)
     def unvendor(self):
         try:
             os.remove(SENTINEL_FILE_PATH)