fix!: run scapy filter creation in the executor

[bdraco]

creating a filter does blocking I/O

[codecov[bot]]

Codecov Report

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

Project coverage is 88.37%. Comparing base (694c831) to head (8b67fc2). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #17 +/- ## ========================================== + Coverage 87.60% 88.37% +0.76% ========================================== Files 1 1 Lines 121 129 +8 Branches 15 16 +1 ========================================== + Hits 106 114 +8 Misses 10 10 Partials 5 5 ```

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