api: Use batch-based narrow updates for marking messages as read.

Fixes #820.

Author: abdallah-9a

.github/workflows/zulip-ci.yml

@@ -48,6 +48,16 @@ jobs:
     runs-on: ubuntu-latest
     name: ${{ matrix.name }} (Zulip ${{matrix.server_version}})
     container: ${{ matrix.docker_image }}
+    services:
+      rabbitmq:
+        image: rabbitmq:3.13
+        ports:
+          - 5672:5672
+        options: >-
+          --health-cmd "rabbitmq-diagnostics -q ping"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 10
     env:
       # GitHub Actions sets HOME to /github/home which causes
       # problem later in provison and frontend test that runs
@@ -56,6 +66,8 @@ jobs:
       # /home/github/.pgpass and setting home to `/home/github/`
       # ensures it written there because we write it to ~/.pgpass.
       HOME: /home/github/
+      RABBITMQ_HOST: rabbitmq
+      RABBITMQ_PORT: "5672"
 
     steps:
       - name: "Check out python-zulip-api"
@@ -71,6 +83,11 @@ jobs:
           path: server
 
       - name: Install dependencies
+        env:
+          HOME: /home/github/
+          CI_USE_EXTERNAL_RABBITMQ: "1"
+          RABBITMQ_HOST: rabbitmq
+          RABBITMQ_PORT: "5672"
         run: |
           cd server
           # This is the main setup job for the test suite