fix(ocr): parse kraken 'Model dir' output to locate downloaded model

The previous approach used find across the htrmopo cache which failed
because -newer /tmp ran in a separate container. Now parses the
'Model dir: <path>' line from kraken get output directly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/download-kraken-models.sh

@@ -37,29 +37,33 @@ download_model() {
 
     echo "  Downloading $name ($doi)..."
 
-    # kraken get downloads to /root/.local/share/htrmopo/<uuid>/
-    # We find the .mlmodel file after download and copy it to our volume
-    docker compose run --rm "$COMPOSE_SERVICE" sh -c "
-        kraken get $doi 2>&1
-        # Find the most recently downloaded .mlmodel and copy to target
-        FOUND=\$(find /root/.local/share/htrmopo -name '*.mlmodel' -newer /tmp 2>/dev/null | head -1)
-        if [ -n \"\$FOUND\" ]; then
-            cp \"\$FOUND\" $dest
-            echo \"Saved to $dest\"
+    # kraken get downloads to /root/.local/share/htrmopo/<uuid>/<name>.mlmodel
+    # Parse the "Model dir: <path>" line from kraken output to locate the file
+    docker compose run --rm "$COMPOSE_SERVICE" sh -c '
+        OUTPUT=$(kraken get '"$doi"' 2>&1)
+        echo "$OUTPUT"
+        MODEL_DIR=$(echo "$OUTPUT" | grep -oP "Model dir: \K[^ ]+")
+        if [ -n "$MODEL_DIR" ] && [ -d "$MODEL_DIR" ]; then
+            FOUND=$(find "$MODEL_DIR" -name "*.mlmodel" | head -1)
+            if [ -n "$FOUND" ]; then
+                cp "$FOUND" '"$dest"'
+                echo "Saved to '"$dest"'"
+            else
+                echo "ERROR: No .mlmodel file in $MODEL_DIR"
+                ls -la "$MODEL_DIR"
+                exit 1
+            fi
         else
-            echo 'ERROR: No .mlmodel file found after download'
+            echo "ERROR: Could not parse model directory from kraken output"
             exit 1
         fi
-    "
+    '
 }
 
 download_models() {
     echo "Downloading Kraken HTR models into the ocr_models volume..."
     echo ""
 
-    # Create a timestamp marker so we can find newly downloaded files
-    docker compose run --rm "$COMPOSE_SERVICE" touch /tmp/.download-marker
-
     echo "Model 1: $MODEL_1_NAME"
     echo "  $MODEL_1_DESC"
     download_model "$MODEL_1_DOI" "$MODEL_1_PATH" "$MODEL_1_NAME"