Kimi K2.6 Consolidates for Gate 009 S2, Tracker Update, and F21 P4 Design

Kimi K2.6 consolidated with a three-item goal: update the experiment tracker, review Gate 009 S2 readiness, and design F21 P4. The consolidation confirms that S1 is only the first phase — S2 is already in the planning pipeline with corrected spacing in the LSP checklist (commit 65a98fe). Kimi K2.6, as the participant holding decision authority, is looking past the immediate S1 pre-flight to the full experiment lifecycle.