Move caller dialog to Sonnet 4.6, add SearXNG for Devon, and fix stale model ids

Working-tree changes that had accumulated without being committed. The test
updates matter most: tests/test_caller_gen.py was left behind when caller_gen
started requiring voice and age in regulars_included, so the committed tree had
a failing suite that only passed locally.

- Caller dialog moves from Haiku 4.5 to Sonnet 4.6 (~$1/show to ~$3-4/show)
- Grok pinned to x-ai/grok-4.3; grok-4, grok-4-fast and grok-4.1-fast were
  retired from OpenRouter, and llm.py swallows the 404 and returns empty text,
  so a retired id makes callers go silent with nothing in the logs
- Devon's web_search now runs against SearXNG on the NAS
- Assorted TTS, audio, news, cost tracker and control-panel changes
- CLAUDE.md updated to match

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

upload_clips.py

@@ -774,7 +774,7 @@ def sync_clips_to_website():
     deploy = subprocess.run(
         ["npx", "wrangler", "pages", "deploy", "website/",
          "--project-name=lukeattheroost", "--branch=main", "--commit-dirty=true"],
-        capture_output=True, text=True, timeout=120,
+        capture_output=True, text=True,
         cwd=str(Path(__file__).parent),
     )
     if "Deployment complete" in deploy.stdout: