feat: adding partitions for user defined source

[codecov[bot]]

Codecov Report

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

Comparison is base (3e3b25f) 94.80% compared to head (c164a24) 95.21%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #124 +/- ## ========================================== + Coverage 94.80% 95.21% +0.41% ========================================== Files 33 33 Lines 1327 1359 +32 Branches 89 89 ========================================== + Hits 1258 1294 +36 + Misses 38 36 -2 + Partials 31 29 -2 ```

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