Replaced inconsistent per-product detection logic with a unified probe
architecture using confidence scoring and product-specific matchers.
Key improvements:
- PBS detection now inspects TLS certs, auth headers (401/403), and
probes PBS-specific endpoints (/api2/json/status, /config/datastore)
fixing false negatives for self-signed and auth-protected servers
- PMG detection uses header analysis first, then conditional endpoint
probing, working consistently regardless of port
- Single unified probeProxmoxService() replaces separate checkPort8006()
and checkServer() code paths, eliminating duplication
- Confidence scoring (0.0-1.0+) with evidence tracking for debugging
- Consolidated hostname resolution and version handling
Technical changes:
- Added ProxmoxProbeResult with structured evidence and scoring
- Added product matchers: applyPVEHeuristics, applyPMGHeuristics,
applyPBSHeuristics
- Removed legacy methods: checkPort8006, checkServer, isPMGServer,
detectProductFromEndpoint, and duplicate hostname helpers
- Updated all tests to use new unified probe architecture
- Added probe_test_helpers.go for test access to internal methods
All tests passing. Fixes PBS detection issues and improves consistency
across PVE/PMG/PBS discovery.
