Move image pixel reads to get_flattened_data and add the font libraries

Pillow 12 renames Image.getdata to get_flattened_data; the award image
normaliser and the isslop hue histogram both read pixels that way. The image
stack also needs pango, harfbuzz, fontconfig and a base font in the container,
so text rendering has glyphs to work with.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -4,6 +4,8 @@ WORKDIR /app
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
     curl ca-certificates \
+    libglib2.0-0 libpango-1.0-0 libpangoft2-1.0-0 libharfbuzz0b libfontconfig1 \
+    fonts-dejavu-core \
     && rm -rf /var/lib/apt/lists/*
 
 # Optional: the docker CLI so the (admin-only) container manager can drive the host

devplacepy/awards/images.py

@@ -12,7 +12,7 @@ def enforce_rgba_png(file_bytes: bytes) -> bytes:
         corner = img.getpixel((0, 0))
         if len(corner) == 4 and corner[3] == 255:
             bg = corner[:3]
-            data = img.getdata()
+            data = img.get_flattened_data()
             cleaned = []
             for pixel in data:
                 if pixel[:3] == bg:

devplacepy/services/jobs/isslop/analysis/domsignals/color.py

@@ -188,7 +188,7 @@ def _screenshot_hue_buckets(screenshot_bytes: bytes) -> dict[int, int]:
     image = Image.open(io.BytesIO(screenshot_bytes)).convert("RGB")
     image = image.resize((64, 64))
     buckets: dict[int, int] = {}
-    for r, g, b in image.getdata():
+    for r, g, b in image.get_flattened_data():
         hue, lightness, saturation = colorsys.rgb_to_hls(r / 255.0, g / 255.0, b / 255.0)
         if saturation < 0.15 or lightness < 0.05 or lightness > 0.95:
             continue