Invalid numeric enum ordinals become invalid enum states in release

[hourianto]

Numeric enum parsing uses v = T(parseInt(strV)). In debug this can abort with RangeDefect. In release it becomes unchecked and constructs enum values outside the declared ordinal range.

Verified PoC, run with and without -d:danger:

import jsony

type Color = enum
  cRed
  cBlue

when defined(release):
  let two = "2".fromJson(Color)
  let large = "999".fromJson(Color)
  doAssert ord(two) == 2
  doAssert ord(large) > ord(high(Color))
  echo "release invalid enum ordinals reproduced: ", ord(two), " / ", ord(large)
else:
  discard "2".fromJson(Color)

Found by GPT 5.4.