Construct and store an xAPI Statement to a Learning Record Store using PUT /statements with a client-generated statementId

Steps

1. Build the Statement body: actor as an Agent with exactly one Inverse Functional Identifier (e.g. mbox: "mailto:user@example.com"), verb as an object with an id IRI and a display language map (e.g. id http://adlnet.gov/expapi/verbs/experienced), and object as an Activity with an id IRI and optional definition.
2. Generate a UUID client-side to use as the Statement's id, and set that same value in the JSON body's id property.
3. Send PUT {endpoint}/statements?statementId={UUID}, where statementId is a URL query parameter that must match the id property in the request body.
4. Include the required headers X-Experience-API-Version (e.g. 1.0.3), Content-Type: application/json, and an Authorization header (Basic or OAuth).
5. Handle the response: 204 No Content on success; 409 Conflict if that statementId already exists with different content, since the LRS must not modify existing statement state in that case.