Re-patch log_attr: make it valid for all integral/floating types

include/spdlog/details/log_attr.h

@@ -43,6 +43,12 @@ public:
         , value{v}
     {}
 
+    template <typename T>
+        requires std::integral<T> || std::floating_point<T>
+    attr(string_view_t k, T v) : value{std::to_string(v)} {
+        key = std::string{k.data(), k.size()};
+    }
+
     attr(string_view_t k, long v)
         : value{std::to_string(v)}
     {