fix(agent): count compression restarts toward retry limit (#3070)

When context overflow triggers compression, the outer retry loop
restarts via continue without incrementing retry_count. If compression
reduces messages but not enough to fit the context window, this creates
an infinite loop burning API credits: API call → overflow → compress →
retry → overflow → compress → ...

Increment retry_count on compression restarts so the loop exits after
max_retries total attempts.

Cherry-picked from PR #2766 by dieutx.

run_agent.py

@@ -6637,6 +6637,11 @@ class AIAgent:
             if restart_with_compressed_messages:
                 api_call_count -= 1
                 self.iteration_budget.refund()
+                # Count compression restarts toward the retry limit to prevent
+                # infinite loops when compression reduces messages but not enough
+                # to fit the context window.
+                retry_count += 1
+                restart_with_compressed_messages = False
                 continue
 
             if restart_with_length_continuation: