Bandwidth Aggregation Optimization

This PR implements two key optimizations to improve bandwidth aggregation efficiency when using workers with unbalanced bandwidth configurations:

Changes Made

1. Out-of-order Frame Processing: Modified the receiver to buffer frames that arrive out of order, preventing slower workers from blocking faster ones
2. Dynamic Frame Allocation: Implemented performance tracking and dynamic frame distribution based on actual worker throughput

Performance Results

• Before: 100KB/s + 500KB/s workers achieved only 34.72% efficiency (208.31KB/s actual vs 600KB/s expected)
• After: 100KB/s + 500KB/s workers achieved 69.44% efficiency (416.64KB/s actual vs 600KB/s expected)
• Balanced Workers: 300KB/s + 300KB/s workers achieved 100.59% efficiency (603.53KB/s actual vs 600KB/s expected)

Testing

Tested with bandwidth-test tool using various worker configurations to verify improvements:

• Unbalanced workers (100KB/s + 500KB/s): Efficiency improved from 34.72% to 69.44%
• Balanced workers (300KB/s + 300KB/s): Achieved 100.59% efficiency

Link to Devin run: https://app.devin.ai/sessions/3571e39c6d55434a84d80937d3437d5b
Requested by: fatedier