docs(research): fact-check web-research and chezmoi docs against sources

- open-models.md: Qwen2.5-VL 'best open vision model' superseded by
  Qwen3-VL (Apache 2.0 dense sizes; repo QwenLM/Qwen3-VL, arXiv
  2511.21631, verified via web search); decision table + mermaid +
  citations updated
- chezmoi-evaluation.md: fleet facts were fabricated — servers run
  Ubuntu 26.04 LTS (probed via ssh, both boxes), not 'Arch/FreeToken'
  (distro does not exist); dev workstation is AMD Ryzen 5 PRO 5650U,
  not Intel Ultra 7; frank-default-* endpoints retired 2026-10-18
- agentic-web-research/index.md: pi-era topology blurb replaced with
  current fleet endpoints
- self-hosted-web-agents.md: sample model frank-default-small ->
  frank-archon (endpoint/IP already correct: dankserver)
- mcp.md reference-server table verified against upstream
  modelcontextprotocol/servers README (exact match, no change)
- 'peer-reviewed BrowseComp' claim from scout ledger: does not exist
  in any file — rejected, not applied

Refs #29

omp-docs/agentic-web-research/index.md

@@ -2,7 +2,12 @@
 
 Agentic web research means that an AI drives the search loop. The agent formulates queries, reads results, decides what to read next, and writes a synthesis. It works best when search, extraction, and reasoning each run in the right place.
 
-> **Your setup:** Pi Web Access calls SearXNG at `192.168.0.143:8081` (dankclaw) and serves models through llama.cpp at `192.168.0.235:7770`, `192.168.0.143:7770`, and `localhost:8080`. The pages below assume that topology.
+> **Fleet topology (2026-10):** SearXNG lives at `192.168.0.143:8081` (UI) /
+> `:8082` (JSON) on dankclaw; model endpoints are `frank-archon`
+> (dankserver :7770, radiance), `frank-dragoon` (dankclaw :7770,
+> halogen-flash-server), `frank-zealot` (dankclaw :7771, llama.cpp PrismML).
+> The pi-era `localhost:8080` llama.cpp endpoint is retired. See
+> [System hosts](/system/index.md).
 
 This section connects four decisions: