DeepSeek Harness subagent delegation enhancement

Key features

• per-call provider="fork" and raw-text persona
• A bundle, not a patched install.
• Web profilethe preset adapter (install-preset.ps1) makes Web sessions use this bundle's tools (verified with the 5 presets above in a live web session)
• This package is a standard dsh bundle (dsh.bundle manifest + cordis.patch.yml): it disables the shipped tool-subagent / tool-subagent-fork rows and inserts its own.
• No official package file is patched — nothing in the dsh installation is modified.