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/PKGBUILD

@@ -61,7 +61,13 @@ package() {
     # These live in LFS; a checkout without `git lfs pull` has ~130-byte
     # pointers here. Installing one produces a package whose face indexing
     # fails inside the graph loader on the user's machine, so refuse instead.
-    for _m in scrfd_500m_640.onnx scrfd_2.5g_640.onnx scrfd_10g_640.onnx arcface_mbf_b1.onnx; do
+    #
+    # The last three are the eye-state models (docs/faces.md §17): landmarks,
+    # open/closed, sunglasses. Optional to the app, which indexes without
+    # them, but shipped beside the pair so the eyes-open filter works out of
+    # the box.
+    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
         _src="models/face/${_m}"
         if [[ "$(stat -c%s "${_src}")" -lt 100000 ]]; then
             echo "error: ${_m} is an LFS pointer, not a model — run: git lfs pull" >&2