feat(*): Add exported Linux binary training path for faster parallel instances

training/setup_linux.sh

@@ -20,6 +20,24 @@ if [ ! -x "$GODOT_BIN" ]; then
 fi
 echo "Godot: $GODOT_BIN"
 
+# Export templates — needed to build the exported training binary
+# (export_linux.sh); the editor binary alone can't produce release exports.
+TEMPLATES_DIR="$HOME/.local/share/godot/export_templates/${GODOT_VERSION}.stable"
+if [ ! -d "$TEMPLATES_DIR" ]; then
+    echo "Downloading Godot $GODOT_VERSION export templates to $TEMPLATES_DIR"
+    TMP_DL="$(mktemp -d)"
+    wget -q "https://github.com/godotengine/godot/releases/download/${GODOT_VERSION}-stable/Godot_v${GODOT_VERSION}-stable_export_templates.tpz" \
+        -O "$TMP_DL/templates.tpz"
+    unzip -o -q "$TMP_DL/templates.tpz" -d "$TMP_DL"
+    mkdir -p "$(dirname "$TEMPLATES_DIR")"
+    # Single mv creates $TEMPLATES_DIR only on full success — if this script is
+    # interrupted any earlier, the guard above correctly sees "not installed"
+    # and retries, instead of finding a half-populated dir and skipping.
+    mv "$TMP_DL/templates" "$TEMPLATES_DIR"
+    rm -rf "$TMP_DL"
+fi
+echo "Export templates: $TEMPLATES_DIR"
+
 # Python env
 [ -d .venv ] || python3 -m venv .venv
 .venv/bin/pip install -q -r requirements.txt