fix: restore per-cycle span duration for execute_event_loop_cycle#1939

Open

Di-Is wants to merge 3 commits intostrands-agents:mainfrom

Di-Is:fix/trace-span-base-exception-handling

Commits on Mar 20, 2026

fix: restore explicit span.end() to fix span end_time regression
Di-Is
committed
fix: handle BaseException in trace spans to prevent span leaks on KeyboardInterrupt
Di-Is
committed
perf: only force flush tracer provider when ending agent spans
Di-Is
committed