Derive API key from AUTH_TOKEN_1 hash for stable restarts

start.sh

@@ -12,11 +12,11 @@ while true; do
     i=$((i + 1))
 done
 
-# Set API key
+# Set API key — derive deterministically from AUTH_TOKEN_1 so it survives restarts
 if [ -n "$PROXY_API_KEY" ]; then
     KEY="$PROXY_API_KEY"
 else
-    KEY="sk-$(od -vN 16 -A none -t x1 /dev/urandom 2>/dev/null | tr -d ' \n')"
+    KEY="sk-$(echo "$AUTH_TOKEN_1" | sha256sum | head -c 32)"
     echo "Generated key: $KEY"
 fi