[Feature]: Create a way to update trace metadata mid-run

[areibman]

💡 Feature Description and Proposed Solution

Suppose we have a function

@trace
def main():
    ...
    project_id = random.random()

Normally, we can only name the trace when we define it: trace(name="myname", tags=[...]), but there are plenty of use cases where we might want to update or change it or add tags.

We should create a function that lets us update root span metadata. In particular:

• Trace name
• Tags
• Status (success/fail)
• As well as potentially any other arbitrary categories

🤔 Related Problem

No response

🤝 Contribution

• Yes, I'd be happy to submit a pull request with these changes.
• I need some guidance on how to contribute.
• I'd prefer the AgentOps team to handle this update.

[areibman]

Something like:

    span.update(
        user_id="user_123",
        session_id="123",
        tags=["123"]
    )