api: fix injection expression indices #457

Job	Run time
pytest-docker-py310-gcc-omp-adjoint	29m 23s
pytest-docker-py310-gcc-omp-arm64-base	34m 26s
pytest-docker-py310-gcc-omp-arm64-adjoint	26m 55s
pytest-docker-py310-icx-omp-adjoint	31m 25s
pytest-docker-py310-icx-omp-base	37m 10s
pytest-docker-py310-gcc-omp-base	42m 3s
pytest-ubuntu-py310-gcc14-omp-adjoint	35m 36s
pytest-osx-py312-clang-omp-base	37m 12s
pytest-ubuntu-py310-gcc14-omp-base	47m 32s
pytest-ubuntu-py311-gcc11-cxxnoomp-base	50m 3s
pytest-ubuntu-py310-gcc9-omp-adjoint	36m 12s
pytest-ubuntu-py312-gcc12-cxxomp-adjoint	40m 0s
pytest-ubuntu-py311-gcc10-noomp-base	44m 53s
pytest-ubuntu-py310-gcc9-omp-base	49m 17s
pytest-ubuntu-py312-gcc13-omp-base	56m 58s
pytest-ubuntu-py311-gcc10-noomp-adjoint	31m 4s
pytest-ubuntu-py312-gcc12-cxxomp-base	1h 1m 29s
pytest-ubuntu-py312-gcc13-omp-adjoint	41m 8s
pytest-ubuntu-py311-gcc11-cxxnoomp-adjoint	32m 26s
pytest-ubuntu-py313-gcc14-omp-base	54m 3s
pytest-ubuntu-py313-gcc14-omp-adjoint	36m 42s
	14h 15m 57s

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