[CI] Jest sharding integration tests (#12400)

# Introduction
Introducing jest sharding along github actions matrix in order to
fluidify the process

Note in case we will compute and guard coverage metrics we will need to
merge coverages reports such as we do for the frontend storybooks
integrations tests, from now this is overkill as unused

Related successful run
https://github.com/twentyhq/twenty/actions/runs/15585113583/job/43889477889

.github/workflows/actions/nx-affected/action.yaml

@@ -10,7 +10,8 @@ inputs:
   configuration:
     required: false
     default: 'ci'
-
+  args:
+    required: false
 runs:
   using: "composite"
   steps:
@@ -18,4 +19,4 @@ runs:
       uses: nrwl/nx-set-shas@v4
     - name: Run affected command
       shell: bash
-      run: npx nx affected --nxBail --configuration=${{ inputs.configuration }} -t=${{ inputs.tasks }} --parallel=${{ inputs.parallel }} --exclude='*,!tag:${{ inputs.tag }}'
+      run: npx nx affected --nxBail --configuration=${{ inputs.configuration }} -t=${{ inputs.tasks }} --parallel=${{ inputs.parallel }} --exclude='*,!tag:${{ inputs.tag }}' ${{ inputs.args }}

.github/workflows/ci-server.yaml

@@ -145,6 +145,10 @@ jobs:
     timeout-minutes: 30
     runs-on: depot-ubuntu-24.04-8
     needs: server-setup
+    strategy:
+      fail-fast: false
+      matrix:
+        shard: [1, 2, 3, 4]
     services:
       postgres:
         image: twentycrm/twenty-postgres-spilo
@@ -183,6 +187,7 @@ jobs:
       ANALYTICS_ENABLED: true
       CLICKHOUSE_URL: "http://default:clickhousePassword@localhost:8123/twenty"
       CLICKHOUSE_PASSWORD: clickhousePassword
+      SHARD_COUNTER: 4
     steps:
       - name: Fetch custom Github Actions and base branch history
         uses: actions/checkout@v4
@@ -220,12 +225,7 @@ jobs:
           tag: scope:backend
           tasks: 'test:integration'
           configuration: 'with-db-reset'
-      - name: Server / Upload reset-logs file
-        if: always()
-        uses: actions/upload-artifact@v4
-        with:
-          name: reset-logs
-          path: reset-logs.log
+          args: --shard=${{ matrix.shard }}/${{ env.SHARD_COUNTER }}
   ci-server-status-check:
     if: always() && !cancelled()
     timeout-minutes: 5