[Feature] SSH Key Rotation Scheduler

[umesh-saini]

🔄 Feature: SSH Key Rotation

Problem

Security best practice recommends rotating SSH keys periodically.
Currently users have to manually regenerate keys and re-upload them to GitHub.

Proposed Solution

Allow users to set a rotation reminder (e.g. every 90 days) per profile.
DevSwitch notifies them when it's time to rotate and can automate the process.

What needs to be done

• Add a keyRotationInterval field to profile (options: 30/60/90/180 days or never)
• Store lastKeyGeneratedAt timestamp per profile
• On app launch, check if any profiles are past their rotation date
• Show a notification/banner on the home page for due profiles
• "Rotate Now" button: generate new key → upload to GitHub → remove old key