feat: add total stats

content/page/search-api-specs.md

@@ -120,7 +120,9 @@ This object is specified according to the [Elasticsearch Query DSL](https://www.
 
 | Field Name | Cardinality | Type | Description |
 |----|----|----|----|
-| value | 1 | int | number of total hits |
+| value | 1 | int | number of total hits (in this scope: pages) |
+| manifests | 1 | int | total number of distinct manifests in hits |
+| matches | 1 | int | total number of matches (equal to the sum of all values from `occurrencesOnPage`) |
 | relation | 1 | string | `eq` (from Elasticsearch), means that there are exactly this number of total hits available |
 
 ### Hits Array
@@ -148,7 +150,9 @@ This describes a single object from the `hits` array that MUST be present but MA
   "hits": {
     "total": {
       "value": 2,
-      "relation": "eq"
+      "relation": "eq",
+      "manifests": 2,
+      "matches": 5
     },
     "hits" : [ {
       "item": "/api/textapi/ahikar/syriac/3r678-186v/latest/item.json",