🛡️ Sentinel: [MEDIUM] Fix sensitive information leakage via RPC error messages

[DerUntote]

🚨 Severity: MEDIUM
💡 Vulnerability: The bot directly exposes internal back-end RPC error messages (err.message) to Discord users via message.reply.
🎯 Impact: Leaking error details depending on the backend daemon's failure responses may expose sensitive configuration, file paths, or infrastructure details.
🔧 Fix: Replaced all message.reply(err.message) occurrences across Tipper modules with a backend console.error(err) log and a generic user-facing "An error occurred." message. Included chained .catch(() => {}) for safety against unhandled rejections on message deletions. Recorded finding in .jules/sentinel.md.
✅ Verification: Tested javascript syntax using node -c. Formatted via npx prettier.

---

PR created automatically by Jules for task 332800904722254973 started by @DerUntote

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.