Forge: Denial of Service via infinite loop in BigInteger.modInverse() with negative input (incomplete fix of CVE-2026-33891)

Summary BigInteger.prototype.modInverse in node-forge's bundled jsbn library enters an infinite loop when the value or the modulus is negative, for example when a negative public exponent is passed to forge.pki.rsa.generateKeyPair. This is an incomplete fix of CVE-2026-33891 GHSA-5m6q-g25r-mvwx,...