🔒 chore: Bump MongoDB from 8.0.17 to 8.0.20 in Docker Compose Files (#12399)

Addresses vulnerabilities disclosed in CERTFR-2026-AVI-0310:
- Improper object lifecycle management of MD5 hash state in core
  cryptographic operations (Blocker/P1)
- Use-after-free in ExpressionContext during pipeline cloning with
  nested $unionWith stages (Major/P3)

deploy-compose.yml

@@ -46,7 +46,7 @@ services:
     container_name: chat-mongodb
     # ports:  # Uncomment this to access mongodb from outside docker, not safe in deployment
     #   - 27018:27017
-    image: mongo:8.0.17
+    image: mongo:8.0.20
     restart: always
     volumes:
       - ./data-node:/data/db

docker-compose.yml

@@ -29,7 +29,7 @@ services:
       - ./logs:/app/logs
   mongodb:
     container_name: chat-mongodb
-    image: mongo:8.0.17
+    image: mongo:8.0.20
     restart: always
     user: "${UID}:${GID}"
     volumes: