Do not repeat the integer conversion that just failed

scan_number_bulk_contiguous() converts an integer token straight from the input
buffer. When the value does not fit, it materializes token_buffer and calls
convert_number(), which tried the very same integer conversion again before
falling back to floating point.

Recording the outcome in number_type skips the second attempt. The resulting
token type and value are unchanged: convert_number() reached the float tail
either way.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MXDi7NTMKAmoArUZSKMc4T
Signed-off-by: Niels Lohmann <mail@nlohmann.me>

include/nlohmann/detail/input/lexer.hpp

@@ -1538,7 +1538,10 @@ scan_number_done:
                 position.chars_read_current_line += (len - 1);
                 return integer_result;
             }
-            // the value overflowed: fall through and let the float tail handle it
+            // The value does not fit an integer, so this token converts as a
+            // float. Recording that here keeps convert_number() below from
+            // repeating the integer attempt that just failed.
+            number_type = token_type::value_float;
         }
 #endif