Consider only log files which are matching a given pattern

[benoit74]

Rationale

Fix #81

Changes

• new configuration variable (via environment variable) to specify the expected file name pattern
• items not matching this pattern are ignored
• tests have been adapted so that file names match the expected pattern + one new test has been created to exercise this feature that the name might not match

[codecov[bot]]

Codecov Report

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

Comparison is base (7b11a99) 100.00% compared to head (3a34a04) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #83 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 36 36 Lines 1066 1070 +4 Branches 199 200 +1 ========================================= + Hits 1066 1070 +4 ```

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