fix: use async with for learning context manager (#1252)

* fix: use async with for learning context manager

the learning SDK's context manager needs to be used with `async with`
when wrapping async code. using sync `with` creates a sync client but
the async interceptor expects an async client for memory operations.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

* chore: update uv.lock with agentic-learning dependencies

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: zzstoatzz

examples/slackbot/src/slackbot/api.py

@@ -102,7 +102,7 @@ async def run_agent(
                 max_tool_calls=settings.max_tool_calls_per_turn,
             ):
                 # wrap agent run with learning context for persistent memory
-                with learning(agent=f"slackbot-{user_context['user_id']}"):
+                async with learning(agent=f"slackbot-{user_context['user_id']}"):
                     result = await create_agent(model=settings.model_name).run(
                         user_prompt=cleaned_message,
                         message_history=conversation,