feat: update plugin error handling and request response docs.

content/shared/v3-core-plugins/_index.md

@@ -219,6 +219,39 @@ obj_to_log = {"hello": "world"}
 influxdb3_local.info("This is an info message with an object", obj_to_log)
 ```
 
+### Trigger Settings
+
+#### Control trigger execution
+
+By default, triggers run synchronously—each instance waits for previous instances to complete before executing.
+
+To allow multiple instances of the same trigger to run simultaneously, configure triggers to run asynchronously:
+
+```bash
+# Create an asynchronous trigger
+influx create trigger --run-asynchronously
+
+#### Configure error handling
+#### Configure error behavior for plugins
+
+The Processing engine logs all plugin errors to stdout and the `system.processing_engine_logs` system table.
+
+To  configure additional error handling for a trigger, use the `--error-behavior` flag:
+
+- `--error-behavior retry`: Attempt to run the plugin again immediately after an error
+- `--error-behavior disable`: Automatically disable the plugin when an error occurs (can be re-enabled later via CLI)
+
+```bash
+# Create a trigger that retries on error
+influx create trigger --error-behavior retry
+
+# Create a trigger that disables the plugin on error
+influx create trigger --error-behavior disable
+This behavior can be changed by specifying the "Error behavior", via the `--error-behavior` flag. Apart from the default `log`, you may set
+
+* `--error-behavior retry` will immediately retry the plugin trigger in the event of error.
+* `--error-behavior disable` will turn off the plugin as soon as an error occurs. You can enable it again using the CLI.
+
 ### Trigger arguments
 
 A plugin can receive arguments from the trigger that runs it.
@@ -388,6 +421,7 @@ influxdb3 create trigger \
 
 On Request plugins are triggered by a request to a custom HTTP API endpoint.
 The plugin receives the shared API, query parameters `Dict[str, str]`, request headers `Dict[str, str]`, the request body (as bytes), and any arguments passed in the trigger definition.
+On Request plugin responses follow conventions for [Flask responses](https://flask.palletsprojects.com/en/stable/quickstart/#about-responses).
 
 #### Example: On Request plugin
 
@@ -411,7 +445,7 @@ def process_request(influxdb3_local, query_parameters, request_headers, request_
 
     influxdb3_local.write(line)
 
-    return 200, {"Content-Type": "application/json"}, json.dumps({"status": "ok", "line": line_str})
+    return {"status": "ok", "line": line_str}
 ```
 
 #### On Request trigger configuration