DeepSeek Harness Projection Shard Warm-up Plugin

The DSH projection plugin is designed to address event loop blocking and timeout issues caused by cold folding of large sessions. Its core mechanisms include pre-warming chunks to yield the event loop, cache backfill from forked child sessions, and background line completion for disk-cold sessions. These features reduce cold folding time from minutes to milliseconds and provide statistics and configuration APIs. Users should be mindful of synchronous decoding limits, memory risks, and compatibility requirements when using the plugin.