feat: Architecture expansion - organisms, swarm evolution, memory gradient, infrastructure

New sections created:
- organisms/ - Modular robot design (CAN bus + magnetic pogo connectors)
- infrastructure/ - Kallax Grid World (40×40×40cm standardized cells)

Core documents added:
- Swarm-Evolution.md - Ternary clasp rules, escalation ladder (L0-L5), Mount Olympus council
- Modular-Organism-Design.md - ESP32 modules, universal connector spec, Phase 0 BOM
- Memory-Gradient.md - Metacognitive routing (renamed from RAG-as-Scaffold.md)
- Kallax-Grid-World.md - Sim-to-real substrate, "schrotti cyberpunk" aesthetic

Enhanced:
- Nimmerswarm-Interface.md - Dual-spectrum architecture (IR position + visible state)
- Attention-Slumber-Prediction-Cycle.md - Blend marker predictions extension

Key insights: Decision markers (mark+continue+predict), Low-Cost-Mocap integration

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

architecture/interfaces/Interfaces-Index.md

@@ -51,6 +51,15 @@ Godot-based visualization and control UI.
 
 ---
 
+## Related Sections
+
+- [`infrastructure/`](../infrastructure/Infrastructure-Index.md) — Physical substrate (Kallax Grid World, camera rigs)
+- [`organs/`](../organs/Organ-Index.md) — Individual system components
+- [`formalization/`](../formalization/) — Theoretical frameworks
+
+---
+
 **File**: Interfaces-Index.md
-**Version**: 1.0
+**Version**: 1.1
 **Created**: 2025-12-28
+**Updated**: 2025-12-29 (added infrastructure crosslink)