✨ feat(mana-notify): add central notification service

NestJS notification microservice for email, push, Matrix, and webhook
notifications across all ManaCore apps.

Features:
- Multi-channel delivery (email, push, Matrix, webhook)
- Handlebars template engine with defaults
- User notification preferences
- BullMQ async job processing
- Delivery tracking and logging
- Prometheus metrics

Includes @manacore/notify-client package for NestJS integration.

services/mana-notify/docker-compose.dev.yml

@@ -0,0 +1,23 @@
+version: '3.8'
+
+# Development compose for mana-notify
+# Provides Redis for BullMQ queue
+# PostgreSQL should be running from root docker-compose
+
+services:
+  redis:
+    image: redis:7-alpine
+    container_name: mana-notify-redis-dev
+    ports:
+      - '6379:6379'
+    volumes:
+      - redis-data:/data
+    command: redis-server --appendonly yes
+    healthcheck:
+      test: ['CMD', 'redis-cli', 'ping']
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
+volumes:
+  redis-data: