Disable lz4 compression as the kernel doesnt support it

docs/TODO.md

@@ -128,6 +128,15 @@ boot LAN.
   - `nvme_tcp`/`nvme_fabrics` must be loaded before `/dev/nvme-fabrics` exists
     (dracut's `nvmf` module does this in a normal boot; at `rd.break` modprobe
     manually).
+  - The target Rocky 9 kernel's erofs is built **without
+    `CONFIG_EROFS_FS_ZIP`** — mounting a compressed image fails `erofs: lz4
+    algorithm isn't enabled`, which silently blocks the root mount. **Fixed:**
+    `extract-artifacts.sh` now builds the erofs **uncompressed** (`mkfs.erofs`
+    without `-z`). Tradeoff: larger rootfs namespace + more NVMe/TCP bandwidth
+    per read. Re-enable compression only against a kernel verified to have
+    `EROFS_FS_ZIP` (`grep CONFIG_EROFS /boot/config-$(uname -r)`). This is the
+    CLAUDE.md bench-verify item ("erofs module availability on the target RHEL
+    kernel"). Larger image size also feeds the "shrink the rootfs" angle of #7.
   - SPDK: add the listener to the discovery subsystem explicitly
     (`nqn.2014-08.org.nvmexpress.discovery`) to silence the deprecation warning.