BUG: Expensive and repeated Metadata Parsing is bad practice

### Is there an existing issue for this?

- [x] I have searched the existing issues

### What happened?

**Where** : `backend/app/database/images.py`

**What happened ?** : from `app.utils.images` import` image_util_parse_metadata` is called inside the for loop within `db_get_all_images.`

**What should be** : Move from `app.utils.images` import `image_util_parse_metadata `to the top of the file (global scope).

**Why?**: Importing a module inside a tight loop executing thousands of times adds unnecessary overhead (though Python caches it, it's bad practice).

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