Treat zot tool_use_start as the canonical tool_execution_start event and skip the later standalone tool_call so Glasspane does not double-fire tool starts. Update the real-key transcript notes to mark the double-fire issue resolved.\n\nValidation: ./scripts/check-format.sh; cargo fmt --check; cargo test -p colibri-glasspane; cargo test -p colibri-daemon glasspane -- --nocapture; cargo test -p colibri-daemon pi_spawn_path_produces_correct_glasspane_state -- --nocapture; cargo clippy -p colibri-glasspane -p colibri-daemon --all-targets -- -D warnings.
