v0.43.0: canonical systemd unit + publish agent binary + golden to Gitea (BUNDLE slice)

- configs/felhom-agent.service: canonical non-root unit (User=felhom-agent, sudo model);
  deliberately NO NoNewPrivileges (breaks sudo) and NO mount-namespacing hardening (breaks
  the intermediary-mount drive propagation into guests) — documented inline.
- scripts/publish-agent.sh: build (optional) + PUT binary to Gitea generic + sha256 +
  GET round-trip. Pinned version, idempotent (delete-then-PUT).
- configs/build-golden.sh: after vzdump, compute sha256 + PUT golden.tar.zst to Gitea
  generic (version = baked controller version). Opt-in; local auto-discovery stays fallback.
- cmd/felhom-agent/main.go: version 0.42.0 -> 0.43.0.
- README: process model now canonical (non-root + publish/install).

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

configs/build-golden.sh

@@ -269,4 +269,50 @@ grep -q "including mount point mp1" /tmp/golden-vzdump.log \
 
 VOLID=$(pvesm list "$ARCHIVE_STORAGE" --content backup 2>/dev/null | awk -v v="$VMID" '$1 ~ ("vzdump-lxc-" v "-") {print $1}' | sort | tail -1)
 echo "[golden] DONE. golden archive volid: ${VOLID:-<check ${ARCHIVE_STORAGE} dump dir>} (rootfs ${OS_SIZE_GB}G + Docker-data ${GOLDEN_DOCKER_GB}G + user-data ${GOLDEN_SYSDATA_GB}G, all in the archive)"
+
+#-------------------------------------------------------------------------------
+# Publish to Gitea (BUNDLE slice) — make this golden fetchable by the host-bootstrap script.
+#-------------------------------------------------------------------------------
+# The host-install script fetches the golden from Gitea
+# (/api/packages/admin/generic/felhom-golden/<golden-version>/golden.tar.zst) and verifies its sha256
+# against the hub-vouched artifact manifest before importing it. <golden-version> = the BAKED
+# controller version (so the golden's published version tracks what it ships). Publishing is OPT-IN:
+# only runs when GITEA_USER + GITEA_TOKEN (or REGISTRY_USER/REGISTRY_TOKEN) are set. The local-golden
+# auto-discovery in the host-install script stays as a fallback either way.
+GITEA_BASE="${GITEA_BASE:-https://gitea.dooplex.hu}"
+GITEA_OWNER="${GITEA_OWNER:-admin}"
+PUB_USER="${GITEA_USER:-${REGISTRY_USER:-}}"
+PUB_TOKEN="${GITEA_TOKEN:-${REGISTRY_TOKEN:-}}"
+# Golden version = the baked controller tag's version (strip the image path + any leading 'v').
+GOLDEN_VERSION="${GOLDEN_VERSION:-${CONTROLLER_IMAGE##*:}}"; GOLDEN_VERSION="${GOLDEN_VERSION#v}"
+
+if [ -z "$VOLID" ]; then
+  echo "[golden] WARN: could not resolve the archive volid — skipping Gitea publish."
+elif [ -z "$PUB_USER" ] || [ -z "$PUB_TOKEN" ]; then
+  echo "[golden] Gitea publish SKIPPED (set GITEA_USER+GITEA_TOKEN or REGISTRY_USER+REGISTRY_TOKEN to enable)."
+  echo "[golden]   would publish version=$GOLDEN_VERSION from volid $VOLID"
+else
+  # Resolve the archive's on-disk path (pvesm path turns a volid into a filesystem path).
+  ARCHIVE_PATH="$(pvesm path "$VOLID" 2>/dev/null || true)"
+  if [ -z "$ARCHIVE_PATH" ] || [ ! -f "$ARCHIVE_PATH" ]; then
+    echo "[golden] WARN: cannot resolve archive path for $VOLID — skipping publish."
+  else
+    GOLDEN_SHA256="$(sha256sum "$ARCHIVE_PATH" | awk '{print $1}')"
+    PUB_URL="${GITEA_BASE}/api/packages/${GITEA_OWNER}/generic/felhom-golden/${GOLDEN_VERSION}/golden.tar.zst"
+    echo "[golden] publishing golden ($(wc -c < "$ARCHIVE_PATH") bytes, sha256 ${GOLDEN_SHA256:0:16}…) → $PUB_URL"
+    # Delete-then-PUT so re-publishing the same version overwrites cleanly (idempotent).
+    dcode="$(curl -fsS -o /dev/null -w '%{http_code}' -u "${PUB_USER}:${PUB_TOKEN}" -X DELETE "$PUB_URL" 2>/dev/null || true)"
+    echo "[golden]   pre-delete existing: HTTP ${dcode} (404/204 expected)"
+    ucode="$(curl -sS -o /dev/null -w '%{http_code}' -u "${PUB_USER}:${PUB_TOKEN}" -X PUT --upload-file "$ARCHIVE_PATH" "$PUB_URL")"
+    if [ "$ucode" = "201" ] || [ "$ucode" = "200" ]; then
+      echo "[golden]   upload OK (HTTP $ucode)"
+      echo "GOLDEN_VERSION=${GOLDEN_VERSION}"
+      echo "GOLDEN_SHA256=${GOLDEN_SHA256}"
+      echo "[golden] Record in the hub operator UI (Configs → Day-0 artifacts): golden ${GOLDEN_VERSION} / ${GOLDEN_SHA256}"
+    else
+      echo "[golden] WARN: golden upload failed (HTTP $ucode) — the local archive is still usable via auto-discovery."
+    fi
+  fi
+fi
+
 echo "[golden] (the build guest $VMID is stopped; destroy it with: pct destroy $VMID --purge)"