Handle transient Slack request errors without crashing the gateway (openclaw#23787) thanks @graysurf

Verified:
- pnpm install --frozen-lockfile
- pnpm build
- pnpm check
- pnpm test:macmini

Co-authored-by: graysurf <10785178+graysurf@users.noreply.github.com>
Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

src/infra/unhandled-rejections.fatal-detection.test.ts

@@ -93,10 +93,22 @@ describe("installUnhandledRejectionHandler - fatal detection", () => {
         Object.assign(new Error("DNS resolve failed"), { code: "UND_ERR_DNS_RESOLVE_FAILED" }),
         Object.assign(new Error("Connection reset"), { code: "ECONNRESET" }),
         Object.assign(new Error("Timeout"), { code: "ETIMEDOUT" }),
+        Object.assign(
+          new Error(
+            "A request error occurred: Client network socket disconnected before secure TLS connection was established",
+          ),
+          { code: "slack_webapi_request_error" },
+        ),
         Object.assign(new Error("A request error occurred: getaddrinfo EAI_AGAIN slack.com"), {
           code: "slack_webapi_request_error",
           original: { code: "EAI_AGAIN", syscall: "getaddrinfo", hostname: "slack.com" },
         }),
+        Object.assign(new Error("A request error occurred: unknown"), {
+          code: "slack_webapi_request_error",
+          original: Object.assign(new Error("connect timeout"), {
+            code: "UND_ERR_CONNECT_TIMEOUT",
+          }),
+        }),
       ];
 
       for (const transientErr of transientCases) {
@@ -119,6 +131,17 @@ describe("installUnhandledRejectionHandler - fatal detection", () => {
       );
     });
 
+    it("exits on non-transient Slack request errors", () => {
+      const slackErr = Object.assign(
+        new Error("A request error occurred: invalid request payload"),
+        {
+          code: "slack_webapi_request_error",
+        },
+      );
+
+      expectExitCodeFromUnhandled(slackErr, [1]);
+    });
+
     it("does not exit on AbortError and logs suppression warning", () => {
       const abortErr = new Error("This operation was aborted");
       abortErr.name = "AbortError";

src/infra/unhandled-rejections.ts

@@ -49,6 +49,7 @@ const TRANSIENT_NETWORK_MESSAGE_CODE_RE =
 const TRANSIENT_NETWORK_MESSAGE_SNIPPETS = [
   "getaddrinfo",
   "socket hang up",
+  "client network socket disconnected before secure tls connection was established",
   "network error",
   "network is unreachable",
   "temporary failure in name resolution",