feat: add custom base URL support for Anthropic-compatible proxies

Support ANTHROPIC_BASE_URL + ANTHROPIC_AUTH_TOKEN to route SDK requests
through LiteLLM or any Anthropic-compatible proxy. Adds TUI wizard
option, TOML config mapping, credential validation, and preflight
endpoint reachability check via SDK query.

apps/worker/src/services/preflight.ts

@@ -196,8 +196,8 @@ async function validateCredentials(logger: ActivityLogger): Promise<Result<void,
           'network',
           false,
           { baseUrl },
-          ErrorCode.AUTH_FAILED
-        )
+          ErrorCode.AUTH_FAILED,
+        ),
       );
     }
   }