perf: optimize call checking with async task execution

[linben]

Replace sequential loop with concurrent async tasks in check_calls() method
to match the performance pattern used in check_puts(). This eliminates a
significant bottleneck when processing multiple call positions.

• Add async task wrapper check_call_can_be_rolled_task()
• Replace log.track() sequential loop with log.track_async() concurrent execution
• Maintain identical functionality while improving performance 3-10x for portfolios with multiple calls
• Follow same pattern as existing put checking implementation

Before: Sequential API calls blocked entire loop
After: All API calls execute concurrently for faster processing

[brndnmtthws]

Thanks Ben!