fix(agent): raise max iterations default from 10 to 200

The low default caused the agent to stop mid-task prematurely.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/config/schema.ts

@@ -293,7 +293,7 @@ const agentsSchema = z.object({
   auto_escalate: z.boolean().default(false),
   max_delegation_depth: z.number().min(1).max(10).default(3),
   /** Maximum tool-loop iterations before the agent stops. */
-  max_iterations: z.number().min(1).max(50).default(10),
+  max_iterations: z.number().min(1).max(200).default(200),
   /** Truthfulness enforcement level: strict | standard | relaxed. */
   truthfulness_mode: truthfulnessModeSchema.default('standard'),
   /** Autonomy level for tool execution: conservative | standard | autonomous. */