Apply EXIF orientation before resizing in optimize_image.py

Add ImageOps.exif_transpose() call after opening the image so that
JPEGs with EXIF Orientation metadata are correctly rotated/flipped
before mode conversion and resizing. Without this, output WebPs could
appear rotated compared to the original.

Fixes review feedback on PR #106.

Author: mrbiggred

scripts/optimize_image.py

@@ -23,7 +23,7 @@
 from pathlib import Path
 
 try:
-    from PIL import Image
+    from PIL import Image, ImageOps
 except ImportError:
     print(
         "Error: Pillow is not installed.\n"
@@ -50,6 +50,9 @@ def optimize_image(input_path: Path, *, quality: int, max_width: int) -> Path |
         print(f"  Error opening {input_path.name}: {e}", file=sys.stderr)
         return None
 
+    # Apply EXIF orientation so JPEGs rotated via metadata are correctly oriented
+    img = ImageOps.exif_transpose(img)
+
     # Convert palette/RGBA images appropriately for WebP
     if img.mode in ("P", "PA"):
         img = img.convert("RGBA")