repochecker: Test number step are in phase with response precision

Closes: https://gitlab.cri.epita.fr/ing/majeures/srs/fic/server/-/issues/36

admin/sync/exercice_defines.go

@@ -3,6 +3,7 @@ package sync
 import (
 	"fmt"
 	"path"
+	"strconv"
 
 	"github.com/BurntSushi/toml"
 	"go.uber.org/multierr"
@@ -78,6 +79,41 @@ func (f ExerciceFlag) RawString() []string {
 	}
 }
 
+func (f ExerciceFlag) RawNumber() ([]float64, error) {
+	switch f.Raw.(type) {
+	case float64:
+		return []float64{f.Raw.(float64)}, nil
+	case []float64:
+		return f.Raw.([]float64), nil
+	case int64:
+		return []float64{float64(f.Raw.(int64))}, nil
+	case []int64:
+		var res []float64
+		for _, raw := range f.Raw.([]int64) {
+			res = append(res, float64(raw))
+		}
+		return res, nil
+	case string:
+		if v, err := strconv.ParseFloat(f.Raw.(string), 64); err == nil {
+			return []float64{v}, nil
+		} else {
+			return nil, err
+		}
+	case []string:
+		var res []float64
+		for _, raw := range f.Raw.([]string) {
+			if v, err := strconv.ParseFloat(raw, 64); err == nil {
+				res = append(res, v)
+			} else {
+				return nil, err
+			}
+		}
+		return res, nil
+	default:
+		return nil, fmt.Errorf("invalid raw type: %T", f.Raw)
+	}
+}
+
 // ExerciceFlagChoice holds informations about a choice (for MCQ and UCQ).
 type ExerciceFlagChoice struct {
 	ExerciceFlag