add Redis session affinity demos (Docker Compose and Kubernetes)

demos/llm_routing/session_affinity_redis/docker-compose.yaml

@@ -0,0 +1,23 @@
+services:
+  redis:
+    image: redis:7-alpine
+    container_name: plano-session-redis
+    restart: unless-stopped
+    ports:
+      - "6379:6379"
+    command: redis-server --save "" --appendonly no
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 1s
+      timeout: 1s
+      retries: 10
+
+  jaeger:
+    build:
+      context: ../../shared/jaeger
+    container_name: plano-session-jaeger
+    restart: unless-stopped
+    ports:
+      - "16686:16686"
+      - "4317:4317"
+      - "4318:4318"