Rename OEM vocabulary to provisioning (ISO)

Matches the runtime rename. The deferred-provisioning install mode replaces
'OEM' everywhere:
  omarchy_install.oem            → omarchy_install.defer_provisioning
  --oem / --oem-file             → --defer-provisioning / --defer-provisioning-file
  OMARCHY_INSTALL_OEM_FILE       → OMARCHY_INSTALL_DEFER_PROVISIONING_FILE
  cidata 'oem' marker            → 'defer-provisioning'
  /var/lib/omarchy/oem/          → /var/lib/omarchy/provisioning/
  /etc/omarchy/oem.key           → /etc/omarchy/provisioning.key
  install/oem/omarchy-oem-setup.service → install/provisioning/omarchy-provision-owner.service
  stage_oem_state phase          → stage_provisioning_state ('Staging provisioning')

Orchestrator internals (OEM_STATE_DIR, _validate_oem_state, ctx.oem, …),
the configurator, cidata-load, the dashboard phase band, the harness
(--oem → --provision), and the tests all move together.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

configs/airootfs/usr/local/bin/omarchy-cidata-load

@@ -11,8 +11,8 @@
 # Anything less than the pair means this isn't an autoinstall drive, and the
 # caller falls back to the wizard.
 #
-# An `oem` marker file stands in for user_credentials.json: OEM installs defer
-# user creation to first boot, so imaging rigs ship no credentials at all.
+# A `defer-provisioning` marker file stands in for user_credentials.json: deferred-provisioning
+# installs defer user creation to first boot, so imaging rigs ship no credentials.
 #
 # The optional argument prefixes every path the script touches; tests use it to
 # run against a sandbox instead of the live system.
@@ -39,17 +39,17 @@ mkdir -p "$mnt"
 mount -o ro "$device" "$mnt" || exit 1
 
 # Clear any inputs a previous load in this live session left in /root before
-# copying the current drive: a stale `oem` marker or credentials file would
-# otherwise force a fresh drive's config back into OEM mode or hand it an old
+# copying the current drive: a stale `defer-provisioning` marker or credentials file would
+# otherwise force a fresh drive back into deferred provisioning or hand it an old
 # LUKS passphrase. The interactive wizard writes these same names, but a
 # cidata load always precedes it, so nothing of the user's is discarded here.
-optional_inputs=(user_credentials.json oem user_full_name.txt user_email_address.txt user_encrypt_installation.txt authorized_keys tailscale_authkey)
+optional_inputs=(user_credentials.json defer-provisioning user_full_name.txt user_email_address.txt user_encrypt_installation.txt authorized_keys tailscale_authkey)
 for file in user_configuration.json "${optional_inputs[@]}"; do
   rm -f "$dest/$file"
 done
 
 loaded=1
-if [[ -f $mnt/user_configuration.json ]] && [[ -f $mnt/user_credentials.json || -f $mnt/oem ]]; then
+if [[ -f $mnt/user_configuration.json ]] && [[ -f $mnt/user_credentials.json || -f $mnt/defer-provisioning ]]; then
   files=("$mnt"/user_configuration.json)
   for file in "${optional_inputs[@]}"; do
     [[ -f $mnt/$file ]] && files+=("$mnt/$file")

configs/airootfs/usr/local/bin/omarchy-install-dashboard

@@ -321,7 +321,7 @@ install_progress() {
     "Installing Arch + Omarchy")  lo=65  hi=700  tau=150 pkg_signal=1 ;;
     "Configuring hibernation")    lo=700 hi=720  tau=10  ;;
     "Configuring system")         lo=720 hi=850  tau=120 ;;
-    "Staging OEM state")          lo=850 hi=855  tau=5   ;;
+    "Staging provisioning")          lo=850 hi=855  tau=5   ;;
     "Finalizing Limine boot")     lo=855 hi=950  tau=90  ;;
     "Finalizing user")            lo=950 hi=978  tau=30  ;;
     "Configuring login")          lo=978 hi=988  tau=5   ;;

configs/airootfs/usr/local/bin/omarchy-iso-install

@@ -18,7 +18,7 @@ while [[ $# -gt 0 ]]; do
     --encrypt-file)         export OMARCHY_INSTALL_ENCRYPT_FILE="$2"; shift 2 ;;
     --authorized-keys-file) export OMARCHY_INSTALL_AUTHORIZED_KEYS_FILE="$2"; shift 2 ;;
     --tailscale-authkey-file) export OMARCHY_INSTALL_TAILSCALE_AUTHKEY_FILE="$2"; shift 2 ;;
-    --oem-file)             export OMARCHY_INSTALL_OEM_FILE="$2"; shift 2 ;;
+    --defer-provisioning-file)             export OMARCHY_INSTALL_DEFER_PROVISIONING_FILE="$2"; shift 2 ;;
     *)                      echo "omarchy-iso-install: unknown arg $1" >&2; exit 2 ;;
   esac
 done