Update UDP docs for the new executor

src/content/docs/integrations/udp.mdx

@@ -15,8 +15,8 @@ Use the IP address `0.0.0.0` to listen on all available network interfaces.
 ## Examples
 
 Use <Op>from_udp</Op> to receive UDP datagrams as
-structured events containing message data and peer information. For sending, use
-<Op>save_udp</Op> with a write operator.
+structured events containing message data and peer information. Use <Op>to_udp</Op>
+to send one UDP datagram per event directly from structured data.
 
 ### Receive syslog messages over UDP
 
@@ -29,6 +29,5 @@ this = data.parse_syslog()
 
 ```tql
 from {message: "Tenzir"}
-write_ndjson
-save_udp "1.2.3.4:8080"
+to_udp "1.2.3.4:8080", message=message
 ```

src/content/docs/reference/operators.mdx

@@ -695,6 +695,10 @@ operators:
     description: 'Saves bytes to a UDP socket.'
     example: 'save_udp "0.0.0.0:8090"'
     path: 'reference/operators/save_udp'
+  - name: 'to_udp'
+    description: 'Sends one UDP datagram per input event.'
+    example: 'to_udp "127.0.0.1:514", message=this'
+    path: 'reference/operators/to_udp'
   - name: 'save_zmq'
     description: 'Sends bytes as ZeroMQ messages.'
     example: 'save_zmq'
@@ -2498,6 +2502,14 @@ save_udp "0.0.0.0:8090"
 
 </ReferenceCard>
 
+<ReferenceCard title="to_udp" description="Sends one UDP datagram per input event." href="/reference/operators/to_udp">
+
+```tql
+to_udp "127.0.0.1:514", message=this
+```
+
+</ReferenceCard>
+
 <ReferenceCard title="save_zmq" description="Sends bytes as ZeroMQ messages." href="/reference/operators/save_zmq">
 
 ```tql

src/content/docs/reference/operators/to_udp.mdx

@@ -0,0 +1,59 @@
+---
+title: to_udp
+category: Outputs/Events
+example: 'to_udp "127.0.0.1:514", message=this'
+---
+
+import Integration from '@components/see-also/Integration.astro';
+import Op from '@components/see-also/Op.astro';
+
+Sends one UDP datagram per input event.
+
+```tql
+to_udp endpoint:str, [message=string|blob|record|null]
+```
+
+## Description
+
+Sends one UDP datagram per input event to a fixed remote UDP endpoint.
+
+### `endpoint: str`
+
+The address of the remote endpoint. Must be of the format `host:port`. The
+optional `udp://` prefix is accepted but not required.
+
+### `message = string|blob|record|null (optional)`
+
+An expression that is evaluated once per input event and must produce one of
+the following types:
+
+- `string` values are sent as UTF-8 bytes.
+- `blob` values are sent verbatim.
+- `record` values are serialized as compact JSON.
+- `null` values are skipped with a warning.
+
+All other result types are ignored with a warning.
+
+If you omit `message`, the operator sends the whole event as compact JSON.
+
+## Examples
+
+Send a field as a UDP datagram:
+
+```tql
+from {message: "hello"}
+to_udp "127.0.0.1:514", message=message
+```
+
+Send the full event as compact JSON:
+
+```tql
+from {service: "dns", status: "ok"}
+to_udp "127.0.0.1:514"
+```
+
+## See Also
+
+- <Op>from_udp</Op>
+- <Op>save_udp</Op>
+- <Integration>udp</Integration>