[TASK][Timpani-n] Assign tasks to specific CPU cores via affinity masks

[LGSI-KarumuriHari]

📝 Task Description

Implement CPU core assignment and isolation using affinity masks.

📋 Checklist

• Implement CPU affinity setting
• Use sched_setaffinity() system call
• Verify affinity application
• Monitor task CPU placement
• Handle affinity conflicts
• Support dynamic affinity updates

🔗 Related Requirement

Relates to #25 (Task Management)
Relates to #16 (Implement Task Management)

📐 Implementation Guidelines

• Functional Requirement: FR-2.3.1 - Assign tasks to specific CPU cores via affinity masks
• Component: timpani-n/Execution Layer/Task Manager
• Apply affinity before first task activation
• Use CPU_SET macros for mask manipulation
• Verify affinity with sched_getaffinity()
• Log affinity assignment

🧪 Testing Method

• Unit test: Verify affinity mask operations
• Integration test: Confirm tasks run on assigned CPUs
• Migration test: Ensure no cross-CPU migration