Added endpoint flexibility along with existing log. extended the log support

Switched Endpoint back to vast-ai, Added endpoint flexibility along with existing log. extended the log support

Modify the endpoint return type as optional and check via pyright to ensure there are not compilation/type errors

workers/hello_world/server.py

@@ -13,7 +13,7 @@ EndpointHandler. This is useful for endpoints such as healthchecks. See below fo
 import os
 import logging
 import dataclasses
-from typing import Dict, Any, Union, Type
+from typing import Dict, Any, Optional, Union, Type
 
 from aiohttp import web, ClientResponse
 
@@ -49,7 +49,11 @@ class GenerateHandler(EndpointHandler[InputData]):
     def endpoint(self) -> str:
         # the API endpoint
         return "/generate"
-
+    
+    @property
+    def healthcheck_endpoint(self) -> Optional[str]:
+        return None
+    
     @classmethod
     def payload_cls(cls) -> Type[InputData]:
         return InputData
@@ -93,7 +97,11 @@ class GenerateStreamHandler(EndpointHandler[InputData]):
     @property
     def endpoint(self) -> str:
         return "/generate_stream"
-
+    
+    @property
+    def healthcheck_endpoint(self) -> Optional[str]:
+        return None
+    
     @classmethod
     def payload_cls(cls) -> Type[InputData]:
         return InputData