🔒 Fix vulnerable PRNG usage in random text generation

[beginwebdev2002]

🎯 What:
Replaced insecure Math.random() with the cryptographically secure crypto.randomInt() in .github/scripts/utils.js's randomText() generator.

⚠️ Risk:
Math.random() and modulo logic (Math.floor(Math.random() * symbols.length)) introduces bias and predictable output sequences, exposing cryptographic flaws if this random string is ever utilized for security boundaries (like generating passwords, nonces, or tokens).

🛡️ Solution:
Imported Node's native crypto.randomInt to ensure an even and unbiased distribution when generating the 35-character random string. This avoids both weak entropy and modulo bias.

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PR created automatically by Jules for task 10416028385035994065 started by @beginwebdev2002

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