[TASK][Timpani-n] Minimize jitter in timer delivery (< 100μs)

[LGSI-KarumuriHari]

📝 Task Description

Achieve low-jitter timer activation for precise real-time scheduling.

📋 Checklist

• Use high-resolution timers (CLOCK_MONOTONIC)
• Minimize signal delivery latency
• Optimize timer interrupt handling path
• Measure and log actual jitter
• Tune kernel for low latency (RT_PREEMPT)
• Report jitter violations

🔗 Related Requirement

Relates to #27 (Scheduler Logic)

📐 Implementation Guidelines

• Functional Requirement: FR-8.2.2 - Minimize jitter in timer delivery (< 100μs)
• Component: timpani-n/Execution Layer/Timer Manager
• Target jitter < 100 microseconds
• Use PREEMPT_RT kernel if available
• Disable CPU frequency scaling for RT cores
• Measure jitter with high-precision timestamps

🧪 Testing Method

• Jitter test: Measure timer delivery variance
• Long-term test: Monitor jitter over extended periods
• Load test: Measure jitter under system load