fix(cli): address Greptile review on template hardening

- default-codex: evict the per-task turn lock on cancel so _task_locks does
  not grow unbounded for the process lifetime.
- temporal-langgraph: increment _turn_number after the non-text guard so a
  skipped non-text event no longer desyncs the turn counter.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: declan-scale

src/agentex/lib/cli/templates/default-codex/project/acp.py.j2

@@ -257,3 +257,6 @@ async def handle_task_event_send(params: SendEventParams):
 @acp.on_task_cancel
 async def handle_task_canceled(params: CancelTaskParams):
     logger.info("Task canceled: %s", params.task.id)
+    # Evict the per-task turn lock so it doesn't accumulate for the lifetime of
+    # the process (one Lock per task otherwise lives forever).
+    _task_locks.pop(params.task.id, None)

src/agentex/lib/cli/templates/temporal-langgraph/project/workflow.py.j2

@@ -93,11 +93,11 @@ class {{ workflow_class }}(BaseWorkflow):
     async def on_task_event_send(self, params: SendEventParams) -> None:
         """Handle a new user message: echo it, then run the agent graph durably."""
         logger.info(f"Received task event for task {params.task.id}")
-        self._turn_number += 1
         content = params.event.content
         if not isinstance(content, TextContent):
             logger.warning("Ignoring non-text event content (type=%s)", getattr(content, "type", "?"))
             return
+        self._turn_number += 1
         user_text = content.content
 
         # Echo the user's message so it shows up as a chat bubble.