fix(server): fix numeric comparisons for float custom tags in smart playlists (#4116)

* Fix numeric comparisons for custom float tags

* feat(criteria): cast numeric tags for sorting and comparisons

Signed-off-by: Deluan <deluan@navidrome.org>

---------

Signed-off-by: Deluan <deluan@navidrome.org>

model/criteria/criteria.go

@@ -4,6 +4,7 @@ package criteria
 import (
 	"encoding/json"
 	"errors"
+	"fmt"
 	"strings"
 
 	"github.com/Masterminds/squirrel"
@@ -40,6 +41,9 @@ func (c Criteria) OrderBy() string {
 		} else {
 			mapped = f.field
 		}
+		if f.numeric {
+			mapped = fmt.Sprintf("CAST(%s AS REAL)", mapped)
+		}
 	}
 	if c.Order != "" {
 		if strings.EqualFold(c.Order, "asc") || strings.EqualFold(c.Order, "desc") {