feat: TASK 031-033 - Node Guardian/Steward + Agent & MicroDAO Chat Widgets

TASK 031: Node Agents Discovery
- Documented existing Monitor agents (NODE1, NODE2)
- Created NODE_AGENTS_INVENTORY.md

TASK 032: Node Guardian/Steward Formalize
- Added migration 030_node_guardian_steward.sql
- Added is_node_guardian, is_node_steward to agents
- Added guardian_agent_id, steward_agent_id to node_cache
- Updated repo_city.py for guardian/steward in node queries
- Added NodeAgentsPanel component for Node Dashboard

TASK 033: Agent & MicroDAO Chat Widgets
- Added CityRoomSummary model
- Added primary_city_room to AgentDashboard API
- Added primary_city_room to MicrodaoDetail API
- Added get_microdao_primary_room() function
- Updated Agent Console with Matrix chat section
- Updated MicroDAO page with public chat section
- Reused existing CityChatWidget component

migrations/030_node_guardian_steward.sql

@@ -0,0 +1,97 @@
+-- Migration 030: Node Guardian and Steward
+-- Додає поля для прив'язки агентів Guardian/Steward до нод
+
+-- 1. Розширити таблицю agents полями для ролей Guardian/Steward
+ALTER TABLE agents
+    ADD COLUMN IF NOT EXISTS is_node_guardian boolean NOT NULL DEFAULT false,
+    ADD COLUMN IF NOT EXISTS is_node_steward boolean NOT NULL DEFAULT false;
+
+-- 2. Розширити node_cache полями для прив'язки агентів
+ALTER TABLE node_cache
+    ADD COLUMN IF NOT EXISTS guardian_agent_id text,
+    ADD COLUMN IF NOT EXISTS steward_agent_id text;
+
+-- 3. Індекси для швидкого пошуку
+CREATE INDEX IF NOT EXISTS idx_agents_is_node_guardian ON agents(is_node_guardian) WHERE is_node_guardian = true;
+CREATE INDEX IF NOT EXISTS idx_agents_is_node_steward ON agents(is_node_steward) WHERE is_node_steward = true;
+
+-- 4. Оновити існуючих Monitor Agent як Guardian
+UPDATE agents
+SET is_node_guardian = true
+WHERE id IN ('monitor-node1', 'monitor-node2', 'agent-monitor-node1', 'agent-monitor-node2');
+
+-- 5. Прив'язати Guardian до нод
+UPDATE node_cache
+SET guardian_agent_id = 'monitor-node2'
+WHERE node_id = 'node-2-macbook-m4max';
+
+UPDATE node_cache
+SET guardian_agent_id = 'monitor-node1'
+WHERE node_id = 'node-1-hetzner-gex44';
+
+-- 6. Створити агентів Node Steward (якщо ще не існують)
+INSERT INTO agents (
+    id, display_name, kind, status, node_id, 
+    is_public, is_node_steward, public_slug,
+    created_at, updated_at
+) VALUES 
+(
+    'node-steward-node1',
+    'Node Steward (НОДА1)',
+    'infra_ops',
+    'online',
+    'node-1-hetzner-gex44',
+    true,
+    true,
+    'node-steward-node1',
+    NOW(),
+    NOW()
+),
+(
+    'node-steward-node2',
+    'Node Steward (НОДА2)',
+    'infra_ops',
+    'online',
+    'node-2-macbook-m4max',
+    true,
+    true,
+    'node-steward-node2',
+    NOW(),
+    NOW()
+)
+ON CONFLICT (id) DO UPDATE SET
+    is_node_steward = true,
+    kind = 'infra_ops',
+    updated_at = NOW();
+
+-- 7. Прив'язати Steward до нод
+UPDATE node_cache
+SET steward_agent_id = 'node-steward-node1'
+WHERE node_id = 'node-1-hetzner-gex44';
+
+UPDATE node_cache
+SET steward_agent_id = 'node-steward-node2'
+WHERE node_id = 'node-2-macbook-m4max';
+
+-- 8. Переконатися, що Monitor Agent (NODE1) існує
+INSERT INTO agents (
+    id, display_name, kind, status, node_id,
+    is_public, is_node_guardian, public_slug,
+    created_at, updated_at
+) VALUES (
+    'monitor-node1',
+    'Node Monitor (НОДА1)',
+    'infra_monitor',
+    'online',
+    'node-1-hetzner-gex44',
+    true,
+    true,
+    'monitor-node1',
+    NOW(),
+    NOW()
+)
+ON CONFLICT (id) DO UPDATE SET
+    is_node_guardian = true,
+    kind = 'infra_monitor',
+    updated_at = NOW();
+