Ship the three eye-state models beside the face pair

2d106det for the eye contours, OCEC for open or closed, SGC for
sunglasses — all three pinned to a batch of one by the same script as
the pair, and installed by every packager so the eyes-open filter works
out of the box. The two classifiers are MIT, code and weights; the
README records their provenance, SGC's undocumented training set, and
the hashes as fetched and as shipped.

packaging/flatpak/paris.tourolle.darkroom.yml

@@ -157,7 +157,8 @@ modules:
       # inside the graph loader on the user's machine. Refuse instead, with the
       # command that fixes it.
       - |
-        for m in scrfd_500m_640.onnx scrfd_2.5g_640.onnx scrfd_10g_640.onnx arcface_mbf_b1.onnx; do
+        for m in scrfd_500m_640.onnx scrfd_2.5g_640.onnx scrfd_10g_640.onnx arcface_mbf_b1.onnx \
+                 2d106det_b1.onnx ocec_s_b1.onnx sgc_l_48_b1.onnx; do
           if [ "$(stat -c%s "models/face/$m")" -lt 100000 ]; then
             echo "error: $m is an LFS pointer, not a model — run: git lfs pull" >&2
             exit 1