fix(core): fix async_wrapper typo in retry decorator (#230)

[Hrithik-ui753]

📝 Description

This PR resolves a critical typo in the asynchronous retry decorator inside core/utils/retry.py. The internal wrapper function was inadvertently named async_wapper instead of async_wrapper, which triggered a NameError whenever an async function using @retry attempted execution.

🐛 Issue Fixed

Closes #230

🛠️ Changes Made

• Corrected async_wapper to async_wrapper within core/utils/retry.py.
• Verified that async functions utilizing the @retry decorator now wrap, resolve, and fallback gracefully without crashing the runtime lifecycle.
• (Optional - leave this line if you wrote one) Added a lightweight unit test regression check to safeguard the async decorator's naming structure.

🚀 Verification Steps

1. Launched Execra using python main.py.
2. Invoked an asynchronous routine decorated with @retry.
3. Observed successful retries on transient failures instead of an abrupt NameError crash.