[Feature] Attach AdditionalInformation to Nodes (#428)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#428

static/js/api/additional-information.js

@@ -186,6 +186,40 @@ window.AdditionalInformationApi = {
     return this._handleResponse(response, "createItem");
   },
 
+    /**
+   * Create new additional information and attach it to an object.
+
+   * @param {string} modelName - Name/type of the additional information model
+   * @param {Object} data - Data for the new item
+   * @param {string} attachObjectUrl - UUID of the object this data should be attached to
+   * @param {string} scenarioUuid - UUID of the scenario
+   * @returns {Promise<{status: string, uuid: string}>}
+   */
+  async createItemOnNonScenarioObject(modelName, data, attachObjectUrl, scenarioUuid) {
+    const sanitizedData = this.sanitizePayload(data);
+    this._log("createItemOnNonScenarioObject", { modelName, data: sanitizedData, attachObjectUrl, scenarioUuid });
+
+    sanitizedData.attach_obj_url = attachObjectUrl;
+    if (scenarioUuid) {
+      sanitizedData.scenario_uuid = scenarioUuid;
+    }
+
+
+    // Normalize model name to lowercase
+    const normalizedName = modelName.toLowerCase();
+
+    const response = await fetch(
+      `/api/v1/information/${normalizedName}/`,
+      {
+        method: "POST",
+        headers: this._buildHeaders(),
+        body: JSON.stringify(sanitizedData),
+      },
+    );
+
+    return this._handleResponse(response, "createItemOnNonScenarioObject");
+  },
+
   /**
    * Delete additional information from a scenario
    * @param {string} scenarioUuid - UUID of the scenario