Revert "Temporarily remove migration check" (#4771)

This reverts commit aaa57c7.

.github/workflows/migrate-touch.yml

@@ -0,0 +1,41 @@
+# SPDX-FileCopyrightText: Copyright 2023 The Minder Authors
+# SPDX-License-Identifier: Apache-2.0
+
+# This test verifies that Pull Requests don't touch the merged database migrations.
+# Folks should now only be adding new migrations to the `database/migrations/` directory.
+name: Database Migrations Untouched
+on:
+  pull_request:
+    paths:
+      - 'database/migrations/*'
+      - '.github/workflows/migrate-touch.yml'
+jobs:
+  verify-migrations:
+    name: Don't touch existing migrations
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@eef61447b9ff4aafe5dcd4e0bbf5d482be7e7871 # v4.2.1
+        with:
+          fetch-depth: 0
+      - name: Verify Migration Files
+        run: |
+          # Check out the base branch
+          git checkout $GITHUB_BASE_REF
+          # Get files in migration directory before our changes
+          BEFORE=$(find database/migrations/ -type f | sort)
+          echo "Files before: $BEFORE"
+
+          # Check out our changes
+          git checkout $GITHUB_SHA -- database/migrations/
+
+          # Verify that the existing migration files were not touched by the new changes
+          modified=$(git diff --name-only origin/$GITHUB_BASE_REF $GITHUB_SHA -- database/migrations/)
+          echo "Files modified: $modified"
+          for file in $modified; do
+            if [[ $BEFORE == *"$file"* ]]; then
+              echo "ERROR: $file was modified by this PR. Please only add new migrations to the database/migrations/ directory."
+              exit 1
+            fi
+          done
+        shell: bash