`inspect_plist` parsed plutil JSON with `JSON.parse`, silently rounding
integers outside ±(2^53 - 1): `18446744073709551615` became
`18446744073709552000` with no limitation. Keep the exact decimal text
from the JSON source as `{ "$plist_type": "integer", "decimal": "..." }`
and add a limitation. On the XML fallback path, the decoder has already
rounded such values, so they become `decimal: null` instead of a wrong
number.
Also restore the `` escape in the BOM regex, which an earlier
rewrite had turned into a raw invisible character.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
430c297ca4