`--commit-range` doesn't restrict the recommendations to changed files in that range

### Issue
When I run the cli command to get a security scan for a given commit range, it includes recommendations across the entire package rather than just the specified commit range.

### Steps to reproduce
1. Run `aws-codeguru-cli --root-dir . --profile --mode security --commit-range HEAD^:HEAD`
2. Observe the the file at `code-guru/recommendations.json` includes recommendations across your entire package.

### Expected Result
Only include recommendations that are part of the diff within the commit range.

### Notes
I tried removing the commit range and noticed that the output is identical which makes me think that the flag is ignored.

This seems related to #9 but I wasn't able to validate the output of the jobs mentioned in that query.

Exécutez la commande aws-codeguru-cli signalée avec et sans --commit-range, puis comparez code-guru/recommendations.json. Suivez le point d’entrée de --commit-range et examinez l’issue #9 associée ; le travail est terminé lorsque recommendations.json contient uniquement des recommandations pour les fichiers modifiés dans la plage de commits spécifiée.

Rédigé par le modèle d'indexation à partir du texte de l'issue.