Add /agents/ location block to nginx config to proxy agent heartbeat requests directly to backend API without /api/v1 prefix duplication, implement normalized_api_url helper to detect and fix double /api/v1 suffixes in agent config with automatic /api/v1 appending when missing, enhance heartbeat error logging to include HTTP status codes, response body preview, and resolved API URL for debugging connection
Add NodeAgent and TrafficFlow models to track agent status and network flows, implement /agents/heartbeat endpoint to receive interface counters, conntrack flows, firewall status, and nftables ruleset hash from agents, add nexafabric-agent.py Python script to collect host telemetry including VM/LXC interface hints via tap/fwbr regex matching, conntrack flow parsing with protocol/state/byte counters, and pve-firewall status checks,
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