dsh-turn-fold v0.2.0

Standalone first release of the dsh-harmony Turn Fold provider.

• Collapses completed-turn activity while keeping the final answer visible
• Preserves native DSH thinking and tool detail views when expanded
• Shows duration, tool-call count, and output-token metrics when reliable
• Keeps failed, interrupted, incomplete, and ambiguous turns expanded
• Targets DSH 0.1.0-rc.7