Merge branch 'main' into toaster/fix-dns-null-cell-resolve

When DNS result-to-JS conversion (toJSResponse/toJSArray) fails, the
error was caught with `catch .zero`, and the resulting JSValue.zero
(all-zero bit pattern) was passed to promise.resolveTask(). On ARM64,
a zero-encoded JSValue passes isCell() but asCell() returns nullptr,
causing a null pointer member call crash in JSC's isGetterSetter().

Fix the four onComplete/onCompleteWithArray functions in the DNS
resolver to check for .zero and reject the promise with the pending
exception instead of resolving with a null cell value.

Crash reproduction:
```js
delete globalThis.Loader;
Bun.generateHeapSnapshot = console.profile = console.profileEnd = process.abort = () => {};
const v4 = new ArrayBuffer(1024, { maxByteLength: 1024 });
new DataView(v4);
new Date();
new SharedArrayBuffer(SharedArrayBuffer, SharedArrayBuffer);
Bun.CookieMap;
Bun.dns.reverse("127.0.0.1");
const v20 = {
    maxByteLength: 3960605680,
    maxByteLength: 1024,
    maxByteLength: 3960605680,
    ...Bun,
    key: "127.0.0.1",
    maxByteLength: 1024,
};
const v22 = new SharedArrayBuffer(64, v20);
("10")["substring"](253);
function f29() {
    return 55103n;
}
new Uint16Array(v22);
Bun.dns.lookup("example.invalid");
Bun.gc(true);
```

https://claude.ai/code/session_01RTdLNAqvERaT7vQSmESYiN

src/bun.js/api/bun/dns.zig

@@ -516,7 +516,12 @@ pub const CAresNameInfo = struct {
         var promise = this.promise;
         const globalThis = this.globalThis;
         this.promise = .{};
-        promise.resolveTask(globalThis, result) catch {}; // TODO: properly propagate exception upwards
+        if (result == .zero) {
+            const exception = globalThis.tryTakeException() orelse .js_undefined;
+            promise.rejectTask(globalThis, exception) catch {};
+        } else {
+            promise.resolveTask(globalThis, result) catch {};
+        }
         this.deinit();
     }
 
@@ -932,7 +937,12 @@ pub const CAresReverse = struct {
         var promise = this.promise;
         const globalThis = this.globalThis;
         this.promise = .{};
-        promise.resolveTask(globalThis, result) catch {}; // TODO: properly propagate exception upwards
+        if (result == .zero) {
+            const exception = globalThis.tryTakeException() orelse .js_undefined;
+            promise.rejectTask(globalThis, exception) catch {};
+        } else {
+            promise.resolveTask(globalThis, result) catch {};
+        }
         if (this.resolver) |resolver| {
             resolver.requestCompleted();
         }
@@ -1013,7 +1023,12 @@ pub fn CAresLookup(comptime cares_type: type, comptime type_name: []const u8) ty
             var promise = this.promise;
             const globalThis = this.globalThis;
             this.promise = .{};
-            promise.resolveTask(globalThis, result) catch {}; // TODO: properly propagate exception upwards
+            if (result == .zero) {
+                const exception = globalThis.tryTakeException() orelse .js_undefined;
+                promise.rejectTask(globalThis, exception) catch {};
+            } else {
+                promise.resolveTask(globalThis, result) catch {};
+            }
             if (this.resolver) |resolver| {
                 resolver.requestCompleted();
             }
@@ -1108,7 +1123,12 @@ pub const DNSLookup = struct {
         var promise = this.promise;
         this.promise = .{};
         const globalThis = this.globalThis;
-        promise.resolveTask(globalThis, result) catch {}; // TODO: properly propagate exception upwards
+        if (result == .zero) {
+            const exception = globalThis.tryTakeException() orelse .js_undefined;
+            promise.rejectTask(globalThis, exception) catch {};
+        } else {
+            promise.resolveTask(globalThis, result) catch {};
+        }
         if (this.resolver) |resolver| {
             resolver.requestCompleted();
         }

test/internal/ban-limits.json

@@ -17,7 +17,7 @@
   "EXCEPTION_ASSERT(!scope.exception())": 0,
   "JSValue.false": 0,
   "JSValue.true": 0,
-  "TODO: properly propagate exception upwards": 114,
+  "TODO: properly propagate exception upwards": 110,
   "alloc.ptr !=": 0,
   "alloc.ptr ==": 0,
   "allocator.ptr !=": 1,