FreeBSD auto-update (#1254): determineArch() now includes freebsd in its
OS switch, producing freebsd-amd64/arm64 instead of falling through to
a uname -m fallback that incorrectly returned linux-<arch>. FreeBSD agents
were downloading Linux ELF binaries and failing to exec them.
Docker rootless socket (#1200): buildRuntimeCandidates() now probes
/run/user/<uid>/docker.sock before the system-wide /var/run/docker.sock,
enabling auto-detection of Docker rootless installations.
Duplicate PVE/PBS hosts (#1245, #1252): handleSecureAutoRegister() now
deduplicates by host URL, updating the existing instance's token in-place
instead of appending a duplicate entry on each re-run of the setup script.
Fixes#1254Fixes#1200Fixes#1245Fixes#1252
(cherry picked from commit 0f1d9e9b9fea6c8b9e65872e8a78e25f93653eef)
- Updated monitoring reload and metrics history to be tenant-aware
- Refactored update manager and checksum validation for multi-tenancy
- Enhanced test coverage for agent updates and metrics storage
