feat: add back matrix backend test

Author: ischolten

.github/workflows/backend.yml

@@ -36,6 +36,43 @@ jobs:
         run: |
           yarn add ts-node && make test-api-docs
 
+  backend-test-gha:
+    name: backend test on GHA
+    runs-on: ubuntu-24.04
+    timeout-minutes: 60
+    permissions:
+      contents: read
+      id-token: write
+    strategy:
+      # This helps not having to run multiple jobs because one fails, thus, reducing resource usage
+      # and reducing the risk that one of many runs would turn red again (read: intermittent tests)
+      fail-fast: false
+      matrix:
+        # XXX: When updating this, make sure you also update MATRIX_INSTANCE_TOTAL.
+        instance: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+        pg-version: ["14"]
+
+    env:
+      # XXX: `MATRIX_INSTANCE_TOTAL` must be hardcoded to the length of `strategy.matrix.instance`.
+      # If this increases, make sure to also increase `flags.backend.after_n_builds` in `codecov.yml`.
+      MATRIX_INSTANCE_TOTAL: 11
+
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        with:
+          repository: getsentry/sentry
+          ref: master
+
+      - name: Setup sentry env
+        uses: ./.github/actions/setup-sentry
+        id: setup
+        with:
+          mode: backend-ci
+
+      - name: Run backend test (${{ steps.setup.outputs.matrix-instance-number }} of ${{ steps.setup.outputs.matrix-instance-total }})
+        run: |
+          make test-python-ci
+
   cli-gha:
     name: cli test on GHA
     runs-on: ubuntu-24.04
@@ -106,6 +143,40 @@ jobs:
         run: |
           yarn add ts-node && make test-api-docs
 
+  backend-test-depot:
+    name: backend test on Depot
+    runs-on: depot-ubuntu-22.04
+    timeout-minutes: 60
+    strategy:
+      # This helps not having to run multiple jobs because one fails, thus, reducing resource usage
+      # and reducing the risk that one of many runs would turn red again (read: intermittent tests)
+      fail-fast: false
+      matrix:
+        # XXX: When updating this, make sure you also update MATRIX_INSTANCE_TOTAL.
+        instance: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+        pg-version: ["14"]
+
+    env:
+      # XXX: `MATRIX_INSTANCE_TOTAL` must be hardcoded to the length of `strategy.matrix.instance`.
+      # If this increases, make sure to also increase `flags.backend.after_n_builds` in `codecov.yml`.
+      MATRIX_INSTANCE_TOTAL: 11
+
+    steps:
+      - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+        with:
+          repository: getsentry/sentry
+          ref: master
+
+      - name: Setup sentry env
+        uses: ./.github/actions/setup-sentry
+        id: setup
+        with:
+          mode: backend-ci
+
+      - name: Run backend test (${{ steps.setup.outputs.matrix-instance-number }} of ${{ steps.setup.outputs.matrix-instance-total }})
+        run: |
+          make test-python-ci
+
   cli-depot:
     name: cli test on Depot
     runs-on: depot-ubuntu-22.04