feat: bake sampling_rate into Judge at construction; simplify Evaluator to List[Judge] #590

Job	Run time
server-ai-linux (3.12)	15s
server-ai-linux (3.14)	20s
server-ai-linux (3.11)	16s
server-ai-optimization-linux (3.12)	10s
server-ai-optimization-linux (3.13)	11s
server-ai-optimization-linux (3.10)	15s
server-ai-openai-linux (3.10)	23s
server-ai-linux (3.13)	15s
server-ai-openai-linux (3.13)	26s
server-ai-windows (3.12)	40s
server-ai-langchain-windows (3.12)	24s
server-ai-optimization-linux (3.11)	15s
server-ai-linux (3.10)	16s
server-ai-openai-linux (3.12)	28s
server-ai-windows (3.13)	22s
server-ai-optimization-windows (3.10)	20s
server-ai-openai-linux (3.11)	23s
server-ai-windows (3.10)	22s
server-ai-openai-linux (3.14)	26s
server-ai-optimization-linux (3.14)	15s
server-ai-openai-windows (3.14)	12s
server-ai-langchain-windows (3.11)	23s
server-ai-windows (3.14)	23s
server-ai-langchain-linux (3.11)	21s
server-ai-optimization-windows (3.11)	26s
server-ai-langchain-windows (3.10)	25s
server-ai-optimization-windows (3.12)	28s
server-ai-langchain-windows (3.13)	42s
server-ai-windows (3.11)	42s
server-ai-openai-windows (3.10)	19s
server-ai-langchain-windows (3.14)	38s
server-ai-optimization-windows (3.13)	20s
server-ai-openai-windows (3.13)	12s
server-ai-langchain-linux (3.14)	21s
server-ai-openai-windows (3.12)	12s
server-ai-optimization-windows (3.14)	22s
server-ai-langchain-linux (3.12)	20s
server-ai-openai-windows (3.11)	35s
server-ai-langchain-linux (3.13)	20s
server-ai-langchain-linux (3.10)	20s
	14m 43s

Provide feedback