Address review setup: rebase, regenerate outputs, ruff + sort fixes

- Rebase onto current main (resolves DIRTY merge state from PRs anthropics#573, anthropics#595)
- Re-execute notebook end-to-end against live XPOZ MCP + Claude Sonnet 4.6
  (804 posts sampled across Twitter/Reddit/Instagram, structured analysis
   committed as cell outputs per CONTRIBUTING.md guidance)
- ruff check + ruff format clean (sorted imports, formatted code)
- authors.yaml sorted alphabetically (validate_authors_sorted.py passes)
- registry.yaml description: 'analyse' -> 'analyze' (US English)

Author: oferw-xpz

authors.yaml

@@ -81,6 +81,10 @@ markn-ant:
 nadine-anthropic:
   name: Nadine Yasser
   avatar: https://avatars.githubusercontent.com/u/238355370?v=4
+oferw-xpz:
+  name: XPOZ
+  website: https://xpoz.ai
+  avatar: https://avatars.githubusercontent.com/u/145556366?v=4
 pauly-ant:
   name: Paul Yang
   website: https://github.com/pauly-ant
@@ -112,10 +116,6 @@ rodrigo-olivares:
   name: Rodrigo Olivares
   website: https://github.com/rodrigo-olivares
   avatar: https://avatars.githubusercontent.com/u/185015001?v=4
-oferw-xpz:
-  name: XPOZ
-  website: https://xpoz.ai
-  avatar: https://avatars.githubusercontent.com/u/145556366?v=4
 zealoushacker:
   name: Alex Notov
   website: https://github.com/zealoushacker