drop rawpy, use libraw/dcraw_emu directly;

rawpy is still supported but will not be bundled by default
due to security concerns

dcraw_emu reads more formats than rawpy + gives better quality
(we told rawpy to use embedded thumbs), so also much slower

dcraw_emu must be combined with libvips or pillow (equivalent)

other alternatives considered:

libvips + a full imagemagick does a different subset of formats,
less than dcraw_emu, yet is 3x slower and eats ram

magick wins wrt formats but is even slower (4x of dcraw_emu)

scripts/docker/Dockerfile.iv

@@ -12,18 +12,12 @@ RUN     apk add -U !pyc ${ADD_PKG} \
             tzdata wget mimalloc2 mimalloc2-insecure \
             py3-jinja2 py3-argon2-cffi py3-pyzmq \
             py3-openssl py3-paramiko py3-pillow \
-            py3-pip py3-cffi \
+            py3-pip \
             py3-magic \
             vips-jxl vips-poppler vips-magick \
-            libraw py3-numpy \
-        && apk add -t .bd \
-            bash wget gcc g++ make cmake patchelf \
-            python3-dev py3-wheel libffi-dev \
-            libraw-dev py3-numpy-dev cython \
+            libraw-tools \
         && rm -f /usr/lib/python3*/EXTERNALLY-MANAGED \
-        && python3 -m pip install pyvips \
-        && python3 -m pip install --no-binary rawpy rawpy \
-        && apk del py3-pip .bd
+        && python3 -m pip install pyvips
 
 COPY    i innvikler.sh ./
 RUN     ash innvikler.sh iv