Differentiate between forecast and history when add_history = TRUE

[vidarsumo]

I think it would be helpful to add a column to the output indicating which part is history and which is forecast when you set add_history = TRUE

Something similar to this.

   unique_id          ds         name         value
   <chr>              <date>     <chr>        <dbl>
 1 felagsgjald_07_pct 2024-05-01 history  195320368
 2 felagsgjald_07_pct 2024-06-01 history  194656304
 3 felagsgjald_07_pct 2024-07-01 history  192950688
 4 felagsgjald_07_pct 2024-08-01 history  187761376
 5 felagsgjald_07_pct 2024-09-01 forecast 185657680
 6 felagsgjald_07_pct 2024-10-01 forecast 185774864
 7 felagsgjald_07_pct 2024-11-01 forecast 198429328
 8 felagsgjald_07_pct 2024-12-01 forecast 194934112
 9 felagsgjald_07_pct 2025-01-01 forecast 187777376
10 felagsgjald_07_pct 2025-02-01 forecast 189336992
11 felagsgjald_07_pct 2025-03-01 forecast 192219104
12 felagsgjald_07_pct 2025-04-01 forecast 194291744
13 felagsgjald_07_pct 2025-05-01 forecast 200309504
14 felagsgjald_07_pct 2025-06-01 forecast 198632576
15 felagsgjald_07_pct 2025-07-01 forecast 196261536
16 felagsgjald_07_pct 2025-08-01 forecast 196332096
17 felagsgjald_07_pct 2025-09-01 forecast 194515232
18 felagsgjald_07_pct 2025-10-01 forecast 194697200
19 felagsgjald_07_pct 2025-11-01 forecast 204339680
20 felagsgjald_07_pct 2025-12-01 forecast 200058864

[MMenchero]

Thank you for the suggestion, @vidarsumo. Since nixtlar aims to mirror the Python SDK, it might also be worth adding this column there. I will discuss it with the nixtla developers in the upcoming days.