Honcho integration for the DeepSeek Harness

Key features

• Injects what Honcho knows at the start of a session — your profile, a summary of this project's session so far, and the conclusions Honcho has drawn that are relevant to what you just asked.
• One API call, shaped to a character budget, refreshed as you work.
• User and assistant messages go to Honcho in the background, debounced, and flushed at turn boundaries, before compaction, and on shutdown.
• Gives the model three tools
• Searches raw messages _and_ derived conclusions.