Add check for parameter yaml to ensure consistence with source

Author: Cstandardlib

.github/workflows/build_test_cmake.yml

@@ -78,3 +78,35 @@ jobs:
           rm -rf build
           cmake -B build -G Ninja ${{ matrix.build_args }}
           cmake --build build -j $(nproc)
+
+      - name: Check parameters.yaml consistency
+        if: matrix.tag == 'gnu' && matrix.build_args == ''
+        run: |
+          ABACUS_BIN=$(find build -maxdepth 1 -name "abacus_*" -type f -executable | head -1)
+          if [ -z "${ABACUS_BIN}" ]; then
+            echo "ERROR: Could not find abacus binary in build/"
+            exit 1
+          fi
+          echo "Using binary: ${ABACUS_BIN}"
+          ${ABACUS_BIN} --generate-parameters-yaml > /tmp/parameters_generated.yaml
+          if ! diff -q docs/parameters.yaml /tmp/parameters_generated.yaml; then
+            echo ""
+            echo "============================================"
+            echo "ERROR: docs/parameters.yaml is out of sync!"
+            echo "============================================"
+            echo ""
+            echo "The committed parameters.yaml does not match the parameter"
+            echo "metadata embedded in the C++ source code. This usually means"
+            echo "a developer modified Input_Item definitions in"
+            echo "source/source_io/module_parameter/read_input_item_*.cpp"
+            echo "but forgot to regenerate the YAML file."
+            echo ""
+            echo "To fix, run the following commands locally:"
+            echo ""
+            echo "  \${ABACUS_BIN} --generate-parameters-yaml > docs/parameters.yaml"
+            echo ""
+            echo "--- Diff ( < committed | > generated ) ---"
+            diff docs/parameters.yaml /tmp/parameters_generated.yaml || true
+            exit 1
+          fi
+          echo "parameters.yaml is up-to-date."