ci: inherit gadfly's default swarm (slim caller, re-pin @b02b11d)

steve/gadfly#10 centralized the curated swarm (3 cloud + Claude Code, 5-lens
suite) as the reusable workflow's input defaults. Drop majordomo's explicit
`with:` swarm block and inherit it; only the consumer-specific allow-list
remains. Re-pin to the post-#10 gadfly commit (@b02b11d). Update CLAUDE.md's
Gadfly section to match (was 6 cloud / 3 lenses).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -142,9 +142,11 @@ Ship work through PRs and let Gadfly review it before merge:
 
 - **Push to a PR, never straight to `main`.** Branch, push, open a PR.
   `.gitea/workflows/adversarial-review.yml` runs Gadfly (the standalone
-  agentic adversarial reviewer) — a fleet of 6 ollama-cloud models, each
-  running the 3-lens suite (security, correctness, error-handling). Advisory
-  only; it never blocks the merge.
+  agentic adversarial reviewer) by subscribing to gadfly's reusable workflow
+  and inheriting its default swarm — 3 cloud models + the Claude Code engine
+  (sonnet/opus/opus:max), each running the 5-lens suite (security, correctness,
+  maintainability, performance, error-handling). The swarm is tuned centrally
+  in gadfly, not here. Advisory only; it never blocks the merge.
 - **Wait for Gadfly to finish, then read its output.** Don't merge while the
   review is still running. Each model posts one consolidated comment; weigh
   every finding on its merits and fix the real ones (Gadfly is a simple