Implement Auto-restart Policies (autorestart)

[alexmond]

Feature Request: Auto-restart Policies

Implement supervisord-compatible auto-restart policies to automatically restart processes based on exit conditions.

Requirements

• Add AutoRestartPolicy enum with values: FALSE, TRUE, UNEXPECTED
• Implement restart logic in ProcessManager
• Add configuration option autorestart to ProcessConfig
• Handle different restart scenarios based on exit codes
• Add tests for all restart policies

Acceptance Criteria

• Processes restart automatically based on configured policy
• FALSE: Never restart
• TRUE: Always restart regardless of exit code
• UNEXPECTED: Restart only on unexpected exit codes (not in exitcodes list)
• Configuration is backward compatible