feat(provision): Phase-0 throwaway test VM via vendored @olsitec/pulumi-hetzner

- Vendor hetzner module (Stage-1, trimmed to @pulumi/hcloud+js-yaml; dropped unused
  types.ts + bcrypt/axios/tls/vault deps). GOTCHA documented: cloud-init moves SSH
  to port 222.
- provision/: isolated stack (platformName foundation-test, no collision with
  olsicloud4-*) — one cx23 in nbg1-dc3 + firewall (222/80/443/2222) + Docker cloud-init.
  Dedicated throwaway ed25519 key (operator id_rsa already registered → uniqueness_error).
- Provisioned + verified: foundation-test @ 91.98.117.152, Docker 29.6.1, docker-over-SSH OK.

Token via ENV (pass), never committed; provision/state gitignored.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package.json

@@ -5,7 +5,8 @@
     "description": "olsitec-foundation mono-repo — the bootstrap egg (bootstrap/) + vendored shared Pulumi modules (packages/*). One git clone = the full DR unit (000_TOPOLOGY.md, ADR-005).",
     "workspaces": [
         "packages/*",
-        "bootstrap"
+        "bootstrap",
+        "provision"
     ],
     "devDependencies": {
         "typescript": "^5.0.0"