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- open-models.md: Qwen2.5-VL 'best open vision model' superseded by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/research/chezmoi-evaluation.md

@@ -170,7 +170,7 @@ This allows plugging in any custom secrets backend.
 
 — [Keychain and Windows Credentials Manager][keyring]
 
-**This is relevant for the workstation** — CachyOS uses GNOME Keyring (KDE uses kwallet, but the system has GNOME components). On the Strix Halo (Arch Linux) and RTX 3090 (FreeToken) boxes, GNOME Keyring or kwallet would be available depending on desktop environment.
+**This is relevant for the workstation** — CachyOS uses GNOME Keyring (KDE uses kwallet, but the system has GNOME components). On the Ubuntu 26.04 server boxes (dankclaw, dankserver), GNOME Keyring or kwallet would be available depending on desktop environment.
 
 ---
 
@@ -336,9 +336,9 @@ Use symlinks for configs that external programs modify and must write back to (V
 
 ### Setup
 
-- **Machine fleet:** the workstation (Intel Ultra 7, CachyOS, niri), dankclaw (Strix Halo, llama.cpp frank-default-large on port 7770), dankserver (RTX 3090, FreeToken, frank-default-small)
+- **Machine fleet:** the dev workstation (AMD Ryzen 5 PRO 5650U laptop, CachyOS, niri) plus client boxes; dankclaw (Strix Halo + RTX 3090, Ubuntu 26.04, fleet services); dankserver (2x Radeon AI PRO R9700, Ubuntu 26.04) — fleet detail: [/system/index.md](/system/index.md)
 - **Central config repo:** `~/.omp` — already a git repo with agent config, model manifests, and the KB
-- **OS mix:** All Linux, but different distros (CachyOS, Arch, custom FreeToken)
+- **OS mix:** All Linux, but different distros (CachyOS on clients, Ubuntu 26.04 LTS on both servers)
 
 ### Verdict: **Recommended with moderate reservations**