feat: conversational agent support #2796

Job	Run time
discover-testcases	3s
basic-testcase / staging	34s
apicalls-testcase / staging	42s
eval-input-overrides / alpha	31s
calculator-crash-evals / cloud	1m 41s
calculator-crash-evals / alpha	1m 21s
apicalls-testcase / cloud	47s
calculator-evals / cloud	2m 54s
eval-spans-testcase / alpha	1m 47s
calculator-evals / staging	2m 55s
langchain-cross / staging	28s
eval-telemetry-testcase / alpha	2m 21s
basic-testcase / cloud	31s
calculator-crash-evals / staging	1m 38s
eval-spans-testcase / cloud	1m 46s
eval-spans-testcase / staging	1m 51s
calculator-evals / alpha	2m 42s
eval-input-overrides / cloud	30s
langchain-cross / cloud	27s
langchain-cross / alpha	26s
tools-evals / cloud	2m 5s
apicalls-testcase / alpha	46s
eval-telemetry-testcase / cloud	2m 21s
tools-evals / staging	2m 30s
tools-evals / alpha	2m 1s
basic-testcase / alpha	31s
eval-telemetry-testcase / staging	2m 25s
eval-input-overrides / staging	30s
summarize-results	3s
	39m 7s

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