test(sdk): update stale send() vitest expectations to the path-keyed contract

Three server.test.ts / server-attachments.test.ts cases still asserted
the pre-verb-lift send shape (POST /v1/api/send with ws_id in the body).
The server route has been POST /v1/api/workstreams/{ws_id}/send (ws_id
in the path, {message} body) since that lift, and the SDK send() was
updated with it — only these expectations rotted. They fail on main
too; unrelated to approvals, folded in here to leave the TS SDK suite
green. Test-only, no SDK source change.

sdk/typescript/tests/server-attachments.test.ts

@@ -104,7 +104,6 @@ describe("TurnstoneServer attachments", () => {
     const [, init] = (fetchFn as ReturnType<typeof vi.fn>).mock.calls[0];
     expect(JSON.parse(init.body)).toEqual({
       message: "hi",
-      ws_id: "ws-X",
       attachment_ids: ["a1", "a2"],
     });
   });
@@ -117,7 +116,7 @@ describe("TurnstoneServer attachments", () => {
     });
     await client.send("hi", "ws-X");
     const [, init] = (fetchFn as ReturnType<typeof vi.fn>).mock.calls[0];
-    expect(JSON.parse(init.body)).toEqual({ message: "hi", ws_id: "ws-X" });
+    expect(JSON.parse(init.body)).toEqual({ message: "hi" });
   });
 
   it("createWorkstream with attachments sends multipart and auto-generates ws_id", async () => {

sdk/typescript/tests/server.test.ts

@@ -74,8 +74,8 @@ describe("TurnstoneServer", () => {
     await client.send("Hello", "ws1");
 
     const [url, init] = (fetchFn as ReturnType<typeof vi.fn>).mock.calls[0];
-    expect(url).toBe("http://test/v1/api/send");
-    expect(JSON.parse(init.body)).toEqual({ message: "Hello", ws_id: "ws1" });
+    expect(url).toBe("http://test/v1/api/workstreams/ws1/send");
+    expect(JSON.parse(init.body)).toEqual({ message: "Hello" });
   });
 
   it("injects auth header when token provided", async () => {