Merge pull request #69 from fettpl/fix/llm-error-leakage

fix: stop leaking LLM error details to clients

src/security/secrets.rs

@@ -242,7 +242,7 @@ fn hex_encode(data: &[u8]) -> String {
 /// Hex-decode a hex string to bytes.
 #[allow(clippy::manual_is_multiple_of)]
 fn hex_decode(hex: &str) -> Result<Vec<u8>> {
-    if hex.len() % 2 != 0 {
+    if !hex.len().is_multiple_of(2) {
         anyhow::bail!("Hex string has odd length");
     }
     (0..hex.len())