feat(09-04): compile switch, date-range, and scope filters

- Filters keep typed values and only registered scope names
- Raw conditions and arbitrary methods fail activation
- Request localization copies labels and leaves identifiers unchanged

pact/capabilities.go

@@ -217,8 +217,11 @@ type RelationBeforeLink interface {
 	RelationBeforeLink(ctx context.Context, relation string, parent, related any, pivot map[string]any) error
 }
 
-// FilterScope is a model method referenced by a config_filter scope name.
+// FilterScope is the model capability a config_filter scope name may call.
+// FilterScopes is the exact, case-sensitive set of names; request text never
+// selects a method outside that set.
 type FilterScope interface {
+	FilterScopes() []string
 	FilterScope(name string, db *gorm.DB, value any) *gorm.DB
 }