fix(everything): move task to params.task and remove pollInterval from requests

- Use params.task instead of params._meta.task for task metadata
- Remove pollInterval from task requests (only available on result)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/everything/tools/trigger-elicitation-request-async.ts

@@ -54,9 +54,8 @@ export const registerTriggerElicitationRequestAsyncTool = (server: McpServer) =>
           method: "elicitation/create" as const,
           params: {
             task: {
-                ttl: 600000, // 10 minutes (user input may take a while)
-                pollInterval: POLL_INTERVAL,
-              },
+              ttl: 600000, // 10 minutes (user input may take a while)
+            },
             message: "Please provide inputs for the following fields (async task demo):",
             requestedSchema: {
               type: "object" as const,

src/everything/tools/trigger-sampling-request-async.ts

@@ -63,13 +63,12 @@ export const registerTriggerSamplingRequestAsyncTool = (server: McpServer) => {
         const { prompt, maxTokens } = validatedArgs;
 
         // Create the sampling request WITH task metadata
-        // The _meta.task field signals to the client that this should be executed as a task
-        const request: CreateMessageRequest & { params: { _meta?: { task: { ttl: number; pollInterval: number } } } } = {
+        // The params.task field signals to the client that this should be executed as a task
+        const request: CreateMessageRequest & { params: { task?: { ttl: number } } } = {
           method: "sampling/createMessage",
           params: {
             task: {
               ttl: 300000, // 5 minutes
-              pollInterval: POLL_INTERVAL,
             },
             messages: [
               {