Implement proper recursive module dependency resolution

- Use depmod -av + modinfo -k approach for accurate dependency detection
- Copy modules to container /lib/modules for proper modinfo -k usage
- Recursive resolution until no more dependencies found
- Copy resolved modules to initramfs + run final depmod in chroot context
- Now properly finds missing core modules like virtio.ko, virtio_ring.ko
- Validates symbol dependencies with proper module database
- Fixed KERNEL_OUTPUT variable binding in build summary

scripts/build.sh

@@ -346,8 +346,16 @@ function main_build_process() {
     section_header "Build Complete"
     log_info "Build time: ${build_minutes}m ${build_seconds}s"
     log_info "Output files:"
-    log_info "  Kernel: ${KERNEL_OUTPUT} ($(get_file_size "$KERNEL_OUTPUT"))"
-    log_info "  Initramfs: ${INITRAMFS_ARCHIVE} ($(get_file_size "$INITRAMFS_ARCHIVE"))"
+    if [[ -n "${KERNEL_OUTPUT:-}" ]]; then
+        log_info "  Kernel: ${KERNEL_OUTPUT} ($(get_file_size "$KERNEL_OUTPUT"))"
+    else
+        log_info "  Kernel: ${DIST_DIR}/vmlinuz.efi ($(get_file_size "${DIST_DIR}/vmlinuz.efi" 2>/dev/null || echo "not found"))"
+    fi
+    if [[ -n "${INITRAMFS_ARCHIVE:-}" ]]; then
+        log_info "  Initramfs: ${INITRAMFS_ARCHIVE} ($(get_file_size "$INITRAMFS_ARCHIVE"))"
+    else
+        log_info "  Initramfs: ${DIST_DIR}/initramfs.cpio.xz ($(get_file_size "${DIST_DIR}/initramfs.cpio.xz" 2>/dev/null || echo "not found"))"
+    fi
 }
 
 # Cleanup build artifacts