LR-IMP-CAMERA-COVERAGE: Sony ILCE-7CR samples in the corpus

Three CC0 raw.pixls.us files of one ILCE-7CR (61 MP) scene: lossless
compressed L and M (subsampled YCbCr) and compressed ARW2. A raw corpus
test pins model, colour-filter layout, black level, white level, as-shot
gains and default crop, and checks that the lossless and compressed
mosaics agree inside the crop (green block correlation 0.9976). An engine
corpus test checks each gets a fitted camera look, not the neutral
fallback. All nine public codings decode and fit (mean dE76 1.59 against
their camera JPEGs).

Co-Authored-By: Claude Opus 5.5 <[email protected]>

xtask/src/main.rs

@@ -340,6 +340,23 @@ const RAW_SAMPLES: &[(&str, &str, &str)] = &[
         "https://raw.pixls.us/data/Sony/ILCE-7M4/ILCE-7M4_DSC06676_FullFrame-LossLess-Compressed-Small.ARW",
         "cbbd0930c7d8706dff84c68a2004454266e6fd0d8354f5f76a106b5d776e0223",
     ),
+    // ILCE-7CR (61 MP), one scene in three codings: lossless compressed L (2×2 CFA cells per LJ92 sample) and M
+    // (subsampled YCbCr), and compressed ARW2
+    (
+        "arw-sony-a7cr-lossless-l.arw",
+        "https://raw.pixls.us/data/Sony/ILCE-7CR/DSC00795.ARW",
+        "3e1642f3a1ae7c9f93228c5f09f27e362608e6a4ca1b3e5d8dd9eb8fae576997",
+    ),
+    (
+        "arw-sony-a7cr-lossless-m.arw",
+        "https://raw.pixls.us/data/Sony/ILCE-7CR/DSC00796.ARW",
+        "5bcba4acc52a5b902074581b4a2f5fb3c79ec56bd0fdc1746b9e2c0f9d3e9c88",
+    ),
+    (
+        "arw-sony-a7cr-compressed.arw",
+        "https://raw.pixls.us/data/Sony/ILCE-7CR/DSC00798.ARW",
+        "f5096e8fbccf0842c8a57763cabd2836608f019eb7fd54f7b22260c2f5bc4da5",
+    ),
     // pre-2017 bodies: white balance only in the enciphered maker note, black level only in the SR2SubIFD (#148)
     (
         "arw-sony-rx100m3.arw",