[WilhelmZA]

Summary

Refs #75.

• Add AOS-CX dual-stack exact-prefix BGP and standard-community commands.
• Add source-aware ping/traceroute and named-VRF routes and diagnostics.
• Parse labelled BGP detail with wrapped communities and multiple paths. Retain unfamiliar or incomplete responses as text.
• Register standard traceroute parsing and add an isolated AOS-CX/GoBGP topology.
• Document the REST tradeoff: current SSH integration reuses credentials and transport; REST needs login/logout cookies, CSRF handling, and validated operational BGP payloads.

Verification

• Backend suite: 1017 passed, including 36 AOS-CX tests.
• Scoped Ruff, lab YAML/TOML parsing, and git diff --check pass.
• Fixtures are attributed vendor-reference excerpts. IPv6/multipath parser variants are explicitly synthetic.

Acceptance remaining

No AOS-CX image is available for live validation. Issue #75 remains open for dual-stack, multipath and VRF captures.

The command reference does not document arbitrary AS-path searches or dual-stack community VRF forms. These are omitted. Community summaries stay text. No REST adapter is included.