[TASK][Timpani-n] Use gPTP-synchronized time for schedule activation

[LGSI-KarumuriHari]

📝 Task Description

Implement CPU affinity assignment, RT priority configuration, and sched_setattr() syscalls.

📋 Checklist

• Use gPTP-synchronized time for activation
• Implement sched_setattr() for SCHED_DEADLINE
• Set runtime, deadline, and period parameters
• Apply CPU affinity before activation
• Coordinate activation across nodes
• Monitor scheduling policy compliance

🔗 Related Requirement

Relates to time synchronization
Relates to #27 (Scheduler Logic)
Relates to #18 (Deadline Scheduling)

📐 Implementation Guidelines

• Functional Requirement: FR-9.3.1 - Use gPTP-synchronized time for schedule activation
• Component: timpani-n/Execution Layer/RT Scheduler
• Base all activation times on synchronized CLOCK_REALTIME
• Use sched_setattr() to configure SCHED_DEADLINE
• Set sched_runtime, sched_deadline, sched_period
• Apply before first task activation

🧪 Testing Method

• Unit test: Verify sched_setattr() parameters
• Integration test: Test synchronized activation across nodes
• RT test: Verify deadline scheduling behavior