feat(ipuaro): add circular dependencies to initial context

- Add formatCircularDeps() to display cycle chains in context
- Add includeCircularDeps config option (default: true)
- Add circularDeps parameter to BuildContextOptions
- Format: ## ⚠️ Circular Dependencies with → arrows
- 23 new tests (1798 total), 97.48% coverage

packages/ipuaro/src/shared/constants/config.ts

@@ -116,6 +116,7 @@ export const ContextConfigSchema = z.object({
     compressionMethod: z.enum(["llm-summary", "truncate"]).default("llm-summary"),
     includeSignatures: z.boolean().default(true),
     includeDepsGraph: z.boolean().default(true),
+    includeCircularDeps: z.boolean().default(true),
 })
 
 /**