Reuse the initialize handler for json-schema-ref-no-deref

The scenario only requires the client to call tools/list against a server
advertising a network $ref; ClientSession never resolves $refs, so the existing
initialize handler (initialize + list_tools) already satisfies it. Register it
under both names instead of duplicating it.

Author: Kludex

.github/actions/conformance/client.py

@@ -164,6 +164,10 @@ async def handle_callback(self) -> tuple[str, str | None]:
 
 
 @register("initialize")
+# SEP-2106: json-schema-ref-no-deref only requires the client to call tools/list against a
+# server advertising a tool with a network $ref. ClientSession never walks inputSchema or
+# resolves $refs, so plain initialize + list_tools satisfies it; no dedicated handler needed.
+@register("json-schema-ref-no-deref")
 async def run_initialize(server_url: str) -> None:
     """Connect, initialize, list tools, close."""
     async with streamable_http_client(url=server_url) as (read_stream, write_stream):
@@ -185,16 +189,6 @@ async def run_tools_call(server_url: str) -> None:
             logger.debug(f"add_numbers result: {result}")
 
 
-@register("json-schema-ref-no-deref")
-async def run_json_schema_ref_no_deref(server_url: str) -> None:
-    """List tools whose schemas contain a network `$ref`; must not dereference it (SEP-2106)."""
-    async with streamable_http_client(url=server_url) as (read_stream, write_stream):
-        async with ClientSession(read_stream, write_stream) as session:
-            await session.initialize()
-            tools_result = await session.list_tools()
-            logger.debug(f"Listed tools without dereferencing network $refs: {[t.name for t in tools_result.tools]}")
-
-
 @register("sse-retry")
 async def run_sse_retry(server_url: str) -> None:
     """Connect, initialize, list tools, call test_reconnection, close."""