APIKIT:BAD_Request - An invalid XML character (Unicode: 0x2) was found in the element content of the document

1. Sanitise the XML payload by removing invalid ASCII control characters, such as Unicode: 0x2, before processing it.

2. Validate the sanitised XML payload against the XSD schema to ensure compliance with the defined rules.

Below is the sample code used for sanitising the XML payload.

<http:listener config-ref="apikit-bad-request-httpListenerConfig" path="/api/*">
            <http:response statusCode="#[vars.httpStatus default 200]">
                <http:headers>#[vars.outboundHeaders default {}]</http:headers>
            </http:response>
            <http:error-response statusCode="#[vars.httpStatus default 500]">
                <http:body>#[payload]</http:body>
                <http:headers>#[vars.outboundHeaders default {}]</http:headers>
            </http:error-response>
        </http:listener>
		<set-payload value="#[payload]" doc:name="Set Payload" doc:id="ef784dfe-491b-4b14-9f9f-1e77652809d7" mimeType="text/plain"/>
		<ee:transform doc:name="remove unwanted characters" doc:id="c15707ee-4ebd-4b31-addf-9467acf5aa20" >
			<ee:message >
				<ee:set-payload ><![CDATA[%dw 2.0
output text/plain
---
(payload replace(/\u0002/) with "")]]></ee:set-payload>
			</ee:message>
		</ee:transform>
		<set-payload value="#[payload]" doc:name="Set Payload to XML" doc:id="3bfd308d-43cb-4e85-bbbe-9e65185dcc89" mimeType="application/xml"/>
		<apikit:router config-ref="apikit-bad-request-config" />