feat: migrate to Gitea, productize Helm chart, unify version

- CI: replace GitLab pipeline with Gitea Actions (.gitea/workflows/release.yaml);
  publish .deb/image/hosted/chart to Gitea registries; gate image+hosted on .deb
  (needs + registry pre-check)
- drop connectone/Nexus; apt now from the Gitea Debian registry
- single version source (/VERSION=3.2.8); CI enforces .env/Chart consistency
- restructure: build/->packaging/deb, root Dockerfile->packaging/image,
  hosted/->packaging/hosted, .kube/->charts/freeradius
- Helm chart: documented values, DB password via Secret/$ENV, configurable
  scheduling/persistence; remove plaintext creds and hostPath PV
- gitignore *.env_cnf; docs for hosted (RU)/helm/root + agent KB sync

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packaging/deb/upload.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+#
+# Uploads built .deb packages to a Gitea Debian package registry.
+#
+# Required env:
+#   DEB_USER          - Gitea username (token owner)
+#   DEB_PASS          - Gitea access token with the write:package scope
+#
+# Optional env (defaults target git.ahax86.ru / owner "pub"):
+#   DEB_REGISTRY      - registry base URL
+#   DEB_DISTRIBUTION  - apt distribution (default: noble)
+#   DEB_COMPONENT     - apt component    (default: main)
+#
+set -euo pipefail
+
+DEB_REGISTRY="${DEB_REGISTRY:-https://git.ahax86.ru/api/packages/pub/debian}"
+DEB_DISTRIBUTION="${DEB_DISTRIBUTION:-noble}"
+DEB_COMPONENT="${DEB_COMPONENT:-main}"
+
+if [ -z "${DEB_USER:-}" ] || [ -z "${DEB_PASS:-}" ]; then
+  echo "DEB_USER and DEB_PASS must be set" >&2
+  exit 1
+fi
+
+upload_url="${DEB_REGISTRY}/pool/${DEB_DISTRIBUTION}/${DEB_COMPONENT}/upload"
+
+shopt -s nullglob
+debs=(*.deb)
+if [ "${#debs[@]}" -eq 0 ]; then
+  echo "No .deb files found to upload" >&2
+  exit 1
+fi
+
+for file in "${debs[@]}"; do
+  echo "Uploading ${file} -> ${upload_url}"
+  curl -fsSL --user "${DEB_USER}:${DEB_PASS}" \
+    --upload-file "./${file}" \
+    "${upload_url}"
+done
+
+echo "Uploaded ${#debs[@]} package(s)"