More robust column selection on `esp_get_prov_siane()`

[dieghernan]

Would fix #115

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 96.31%. Comparing base (1cce4db) to head (7dc25da). Report is 4 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #116 +/- ## ======================================= Coverage 96.31% 96.31% ======================================= Files 31 31 Lines 1871 1874 +3 ======================================= + Hits 1802 1805 +3 Misses 69 69 ```

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