Integrate zosstorage build path and runtime orchestration

Summary:

* add openssh-client to the builder image and mount host SSH keys into the dev container when available

* switch RFS to git builds, register the zosstorage source, and document the extra Rust component

* wire zosstorage into the build: add build_zosstorage(), ship the binary in the initramfs, and extend component validation

* refresh kernel configuration to 6.12.49 while dropping Xen guest selections and enabling counted-by support

* tighten runtime configs: use cached mycelium key path, add zosstorage zinit unit, bootstrap ovsdb-server, and enable openvswitch module

* adjust the network health check ping invocation and fix the RFS pack-tree --debug flag order

* update NOTES changelog, README component list, and introduce a runit helper for qemu/cloud-hypervisor testing

* add ovsdb init script wiring under config/zinit/init and ensure zosstorage is available before mycelium

scripts/dev-container.sh

@@ -9,6 +9,7 @@ PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
 # Container configuration
 CONTAINER_NAME="zero-os-dev"
 BUILDER_IMAGE="zero-os-builder:latest"
+HOST_SSH_DIR="${SSH_MOUNT_DIR:-${HOME}/.ssh}"
 
 # Default to verbose, streaming logs for dev flows unless explicitly disabled
 export DEBUG="${DEBUG:-1}"
@@ -88,18 +89,32 @@ function dev_container_start() {
     log_info "Creating new development container: ${CONTAINER_NAME}"
     
     # Create persistent container with all necessary mounts and environment
-    safe_execute podman run -d \
-        --name "$CONTAINER_NAME" \
-        --privileged \
-        -v "${PROJECT_ROOT}:/workspace" \
-        -w /workspace \
-        -e DEBUG=1 \
-        -e ALPINE_VERSION=3.22 \
-        -e KERNEL_VERSION=6.12.44 \
-        -e RUST_TARGET=x86_64-unknown-linux-musl \
-        -e OPTIMIZATION_LEVEL=max \
-        "$BUILDER_IMAGE" \
+    local podman_args=(
+        run -d
+        --name "$CONTAINER_NAME"
+        --privileged
+        -v "${PROJECT_ROOT}:/workspace"
+        -w /workspace
+        -e DEBUG=1
+        -e ALPINE_VERSION=3.22
+        -e KERNEL_VERSION=6.12.44
+        -e RUST_TARGET=x86_64-unknown-linux-musl
+        -e OPTIMIZATION_LEVEL=max
+    )
+
+    if [[ -d "$HOST_SSH_DIR" ]]; then
+        log_info "Mounting SSH directory: ${HOST_SSH_DIR} -> /root/.ssh (read-only)"
+        podman_args+=(-v "${HOST_SSH_DIR}:/root/.ssh:ro")
+    else
+        log_warn "SSH directory not found at ${HOST_SSH_DIR}; skipping SSH mount"
+    fi
+
+    podman_args+=(
+        "$BUILDER_IMAGE"
         sleep infinity
+    )
+
+    safe_execute podman "${podman_args[@]}"
     
     log_info "Development container started successfully"
     log_info "Container name: ${CONTAINER_NAME}"