Summary

Fixes slow cross-region agent bootstrap by switching WebSocket file transfer chunks from base64 text frames to binary frames.

This reduces overhead during controller-to-agent bootstrap file delivery, especially for EAST controller -> WEST agent traffic, where bootstrap was taking ~4-5 minutes before this work. Also increases the bootstrap connection budget and adds transfer timing/throughput logs so we can see whether future bottlenecks are network, reconnects, or transfer behavior.

What Changed

• Added binary WebSocket file chunk support for startup bootstrap and harness file transfer.
• Updated controller transfer logic to send binary chunks instead of base64-encoded JSON payloads.
• Added agent-side binary chunk handling for both startup and apiharness WS servers.
• Increased startup bootstrap connection budget to reduce reconnect/resume loops on slower cross-region transfers.
• Added transfer completion metrics: duration, chunk count, chunk size, resume offset, throughput.

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