Fixed outer regions fails for certain flux files

[joe-pitt]

When I run an inversion with fixed outer regions using this flux file (https://uob-my.sharepoint.com/:u:/g/personal/zh21490_bristol_ac_uk/EaVEt0JeRt1BjVGcOz3KOkQBWgpJ2VuuMwDuYUb0JlMinw?e=tlcda0) I get the following error:

Traceback (most recent call last):
  File "/user/home/zh21490/openghg_inversions/openghg_inversions/hbmcmc/run_hbmcmc.py", line 247, in <module>
    mcmc_function(**param)
  File "/user/home/zh21490/openghg_inversions/openghg_inversions/hbmcmc/hbmcmc.py", line 437, in fixedbasisMCMC
    fp_data = basis_functions_wrapper(
              ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/user/home/zh21490/openghg_inversions/openghg_inversions/basis/_wrapper.py", line 95, in basis_functions_wrapper
    basis_data_array = fixed_outer_regions_basis(
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/user/home/zh21490/openghg_inversions/openghg_inversions/basis/_functions.py", line 201, in fixed_outer_regions_basis
    basis.loc[loc_dict] = (inner_region + 5).squeeze().values
    ~~~~~~~~~^^^^^^^^^^
  File "/user/home/zh21490/.conda/envs/openghg_dev_env/lib/python3.12/site-packages/xarray/core/dataarray.py", line 246, in __setitem__
    self.data_array[dim_indexers] = value
    ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
  File "/user/home/zh21490/.conda/envs/openghg_dev_env/lib/python3.12/site-packages/xarray/core/dataarray.py", line 892, in __setitem__
    self.variable[key] = value
    ~~~~~~~~~~~~~^^^^^
  File "/user/home/zh21490/.conda/envs/openghg_dev_env/lib/python3.12/site-packages/xarray/core/variable.py", line 866, in __setitem__
    indexing.set_with_indexer(indexable, index_tuple, value)
  File "/user/home/zh21490/.conda/envs/openghg_dev_env/lib/python3.12/site-packages/xarray/core/indexing.py", line 1012, in set_with_indexer
    indexable[indexer] = value
    ~~~~~~~~~^^^^^^^^^
  File "/user/home/zh21490/.conda/envs/openghg_dev_env/lib/python3.12/site-packages/xarray/core/indexing.py", line 833, in __setitem__
    self.array[indexer] = value
    ~~~~~~~~~~^^^^^^^^^
  File "/user/home/zh21490/.conda/envs/openghg_dev_env/lib/python3.12/site-packages/xarray/core/indexing.py", line 1521, in __setitem__
    self._safe_setitem(array, key, value)
  File "/user/home/zh21490/.conda/envs/openghg_dev_env/lib/python3.12/site-packages/xarray/core/indexing.py", line 1504, in _safe_setitem
    raise exc
  File "/user/home/zh21490/.conda/envs/openghg_dev_env/lib/python3.12/site-packages/xarray/core/indexing.py", line 1495, in _safe_setitem
    array[key] = value
    ~~~~~^^^^^
ValueError: could not broadcast input array from shape (183,128) into shape (182,127)

When I use this flux file (https://uob-my.sharepoint.com/:u:/g/personal/zh21490_bristol_ac_uk/EfLKUfzbGKFOkESMI3b3iAkB8z_QTe-B06lFE_k_s7pakw?e=RpV7B6) the inversion runs fine. The only difference appears to be a very small difference in the lat/lon values, which should be within tolerance.