hub: delete the host-install version label (R-94) + invert hostinstall gate 1

The Setup tab said 'host-install 1.19.0' while the served script was 1.22.0, and had
been wrong since 2026-07-14. Deriving the number honestly is not possible: the Option-1
command downloads felhom-host-install.sh from the website at RUN TIME and the website
git-syncs main every 30s (R-110), so no build-time value in the hub can be true. R-94(a)
offered derive-or-delete; deleted, which removes the drift class instead of automating it.

- configs.go: hostInstallVersion const, pageData.ScriptVersion field and its assignment
  all removed; a NOTE in their place records why there is no constant here.
- customer_unified.html: the sentence now says the command always fetches the current
  installer, and renders no version.
- hostinstall_gates.py gate 1: the third assertion INVERTS — it used to require the hub
  const to equal SCRIPT_VERSION, it now asserts the hub carries no host-install version
  literal at all, matched in six code shapes across every .go/.html under hub/ (comments
  are deliberately not stripped: a // inside a URL literal would blind the scan).
- render_test.go: the assertion 'html contains hostInstallVersion' compared the constant
  to itself and passed at ANY value — demonstrated green with the const at 9.9.9 while the
  script was 1.22.0. Deleted, not replaced: there is no longer a version to assert.
- felhom-host-install.sh: COMMENT ONLY (SCRIPT_VERSION untouched) — it claimed the gate
  keeps the hub copy equal, an invariant that no longer exists.

Red-proofs: restoring the const fails the rewritten gate 1 (3 shapes hit); the old
render_test assertion passes at 9.9.9.

scripts/felhom-host-install.sh

@@ -184,9 +184,11 @@
 
 set -euo pipefail
 
-SCRIPT_VERSION="1.22.0"   # the SINGLE version source (F-1): -h, the run banners, and the hub
-                          # Setup-tab copy (hub internal/web/configs.go hostInstallVersion —
-                          # scripts/hostinstall_gates.py asserts the two stay equal) all follow it.
+SCRIPT_VERSION="1.22.0"   # the SINGLE version source (F-1): -h and the run banners follow it.
+                          # The hub used to carry a copy for its Setup tab; R-94 DELETED it
+                          # (2026-08-02) because the hub cannot know which version a box runs —
+                          # the Setup command fetches this script at run time. scripts/
+                          # hostinstall_gates.py now asserts the hub carries NO version literal.
                           # 1.16.0: the FELHOM_ESCROW sudoers alias (controller-driven escrow
                           # ceremony, agent v0.88.0) ships on every install/update — it rides the
                           # CANONICAL sudoers fetch below (configs/felhom-agent.sudoers from the