fix: update token scheduler to use dynamic expiration and renewal intervals

[egalvis27]

What is Changed / Added

• Updated token renewal policy from a fixed 5-day value to the new timing policy.
• Added explicit constants for:
  • Token expiration: 12 hours
  • Renewal interval: 4 hours
  • Renewal offset before expiration: 8 hours (12h - 4h), converted to days for the current scheduler input

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud