bump go-structr to v0.8.9 (returns early if zero uncached keys to be loaded)

vendor/codeberg.org/gruf/go-structr/cache.go

@@ -375,6 +375,11 @@ func (c *Cache[T]) Load(index *Index, keys []Key, load func([]Key) ([]T, error))
 	// the lock.
 	unlock()
 
+	if len(keys) == 0 {
+		// We loaded everything!
+		return values, nil
+	}
+
 	// Load uncached values.
 	uncached, err := load(keys)
 	if err != nil {

vendor/codeberg.org/gruf/go-structr/item.go

@@ -41,7 +41,6 @@ func free_indexed_item(item *indexed_item) {
 }
 
 // drop_index will drop the given index entry from item's indexed.
-// note this also handles freeing the index_entry memory (e.g. to pool)
 func (i *indexed_item) drop_index(entry *index_entry) {
 	for x := 0; x < len(i.indexed); x++ {
 		if i.indexed[x] != entry {

vendor/codeberg.org/gruf/go-structr/runtime.go

@@ -152,8 +152,10 @@ func extract_fields(ptr unsafe.Pointer, fields []struct_field) []unsafe.Pointer
 			fptr = field.zero
 		}
 
+		// Set field ptr.
 		ptrs[i] = fptr
 	}
+
 	return ptrs
 }