fix(orchestrator): update busybox path from internal/ to pkg/ in fetch-busybox

The internal/ → pkg/ restructuring on main renamed the template build
directory, but fetch-busybox still referenced the old internal/ path.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 2 people

packages/orchestrator/Makefile

@@ -135,7 +135,7 @@ build-template:
 .PHONY: fetch-busybox
 fetch-busybox:
 	@ARCH=$(BUILD_ARCH); \
-	BUSYBOX_TARGET=./internal/template/build/core/systeminit/busybox_1.36.1-2; \
+	BUSYBOX_TARGET=./pkg/template/build/core/systeminit/busybox_1.36.1-2; \
 	if [ "$$ARCH" != "arm64" ]; then \
 		echo "✓ Using bundled amd64 busybox"; \
 	elif file "$$BUSYBOX_TARGET" 2>/dev/null | grep -q 'aarch64\|ARM aarch64'; then \