feat(dais): DAIS Layer Architecture v1

## DAIS = DAARION Agent Identity System

- Complete architecture document for agent identity
- DAIS Identity = паспорт + сім-карта + soulbound-token
- Trust Levels: guest → agent → verified → orchestrator → operator
- Keys: ed25519, x25519, secp256k1 (future: PQC)
- Wallet: Polygon, TON, Ethereum
- Lifecycle: Creation → Issuance → Keys → Wallet → Assignment → Execution → Promotion → Revocation

## Key concepts:
- Every agent = digital personality with DAIS
- DAIS connects all layers: City, District, MicroDAO, Nodes, Rooms
- Foundation for Governance and Permissions
- Web3/SIWE ready

Doc #14 in foundation series

docs/foundation/README.md

@@ -6,7 +6,7 @@
 
 ## Статус: ✅ FOUNDATION_UPDATE Complete
 
-**Всього файлів:** 20 (13 основних + 6 helpers + 1 patch)
+**Всього файлів:** 21 (14 основних + 6 helpers + 1 patch)
 
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@@ -33,7 +33,8 @@
 | 10 | [`City_Interface_Architecture_v1.md`](./City_Interface_Architecture_v1.md) | City Square, DARIO/DARIA, public rooms, portals |
 | 11 | [`Agents_Interface_Architecture_v1.md`](./Agents_Interface_Architecture_v1.md) | Agent-centric UI: primary/team agents, кабінети |
 | 12 | [`Nodes_Interface_Architecture_v1.md`](./Nodes_Interface_Architecture_v1.md) | Node dashboards, registration, health, DAGI Mesh |
-| 13 | [`District_Interface_Architecture_v1.md`](./District_Interface_Architecture_v1.md) | **NEW** District Layer: Campus Map, Sub-DAOs, Portals |
+| 13 | [`District_Interface_Architecture_v1.md`](./District_Interface_Architecture_v1.md) | District Layer: Campus Map, Sub-DAOs, Portals |
+| 14 | [`DAIS_Layer_Architecture_v1.md`](./DAIS_Layer_Architecture_v1.md) | **NEW** DAIS Identity System: Keys, Wallets, Lifecycle |
 
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