v1.0.18

Changes

• Remove create_local tool — local commands now run directly via execute() without session setup
• Remove list_sessions and list_commands tools — simplified API surface
• Make send_control signal parameter required — destructive operations should be explicit
• Make disconnect idempotent — repeated calls return true instead of raising
• Tool descriptions optimized — all 6 tools score 5/5 on Glama Tool Quality
• Store original command string in RunningCommand for observability

Tool count: 8 → 6 (connect_ssh, execute, respond, read_output, send_control, disconnect)