feat: add ES annotations

src/core/things/DateSeries.ts

@@ -34,6 +34,8 @@ export interface SCSportCoursePriceGroup
   extends SCAcademicPriceGroup {
   /**
    * Price for alumnis
+   * 
+   * @float
    */
   alumni?: number;
 }
@@ -60,6 +62,8 @@ export interface SCDateSeriesWithoutReferences
 
   /**
    * Frequency of the date series
+   * 
+   * @keyword
    */
   frequency: string;
 
@@ -78,6 +82,7 @@ export interface SCDateSeriesWithoutReferences
  * A date series
  *
  * @validatable
+ * @indexable
  */
 export interface SCDateSeries
   extends SCDateSeriesWithoutReferences,