feat(FN-3593): add test isolation CI enforcement, fix stuck-requeue race, a

This merge lands five FN-3593 commits establishing a test isolation contract with a new `scripts/check-test-isolation.mjs` guard that scans for accidental `beforeEach`/`afterEach`/`beforeAll`/`afterAll` in setup helpers, plus per-package `setup-test-isolation.ts` bootstraps that canonicalize the pat

Fusion-Task-Id: FN-3593

packages/engine/src/agent-tools.ts

@@ -113,13 +113,6 @@ export const sendMessageParams = Type.Object({
   reply_to_message_id: Type.Optional(
     Type.String({ description: "Optional ID of the message you are replying to (use IDs from fn_read_messages output)" }),
   ),
-  wake_recipient: Type.Optional(
-    Type.Boolean({
-      description:
-        "If true, wake the recipient agent immediately on receipt regardless of their messageResponseMode. " +
-        "Use sparingly for urgent messages. Ignored when the recipient is a user.",
-    }),
-  ),
 });
 
 export const readMessagesParams = Type.Object({
@@ -1417,8 +1410,7 @@ export function createSendMessageTool(messageStore: MessageStore, fromAgentId: s
     label: "Send Message",
     description:
       "Send a message to another agent or user. The recipient will be woken if they have " +
-      "`messageResponseMode: 'immediate'` configured, or if you set `wake_recipient: true` " +
-      "to override their setting for an urgent message. When replying to an existing message, " +
+      "`messageResponseMode: 'immediate'` configured. When replying to an existing message, " +
       "include `reply_to_message_id` to preserve threading.",
     parameters: sendMessageParams,
     // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -1453,15 +1445,6 @@ export function createSendMessageTool(messageStore: MessageStore, fromAgentId: s
           };
         }
 
-        const wakeRecipient = params.wake_recipient === true && recipient.type === "agent";
-        const metadata =
-          replyToMessageId || wakeRecipient
-            ? {
-                ...(replyToMessageId ? { replyTo: { messageId: replyToMessageId } } : {}),
-                ...(wakeRecipient ? { wakeRecipient: true } : {}),
-              }
-            : undefined;
-
         const message = messageStore.sendMessage({
           fromId: fromAgentId,
           fromType: "agent",
@@ -1469,7 +1452,7 @@ export function createSendMessageTool(messageStore: MessageStore, fromAgentId: s
           toType: recipient.type,
           content,
           type: messageType,
-          ...(metadata ? { metadata } : {}),
+          ...(replyToMessageId ? { metadata: { replyTo: { messageId: replyToMessageId } } } : {}),
         });
 
         return {