fix(langchain): Set agent name as gen_ai.agent.name for chat and tool spans
#7207
| Job | Run time |
|---|---|
| 3m 14s | |
| 3m 35s | |
| 1m 44s | |
| 3m 45s | |
| 1m 41s | |
| 2m 34s | |
| 2m 20s | |
| 1m 41s | |
| 3s | |
| 20m 37s |