ci: switch from SLSA provenance to actions/attest with subject-path #425

Job	Run time
server-ai-openai-windows (3.11)	29s
server-ai-optimization-linux (3.11)	10s
server-ai-openai-windows (3.13)	23s
server-ai-linux (3.13)	16s
server-ai-linux (3.12)	15s
server-ai-linux (3.11)	16s
server-ai-optimization-linux (3.10)	11s
server-ai-linux (3.10)	18s
server-ai-windows (3.12)	25s
server-ai-optimization-linux (3.12)	12s
server-ai-openai-windows (3.10)	18s
server-ai-optimization-windows (3.13)	19s
server-ai-openai-linux (3.13)	19s
server-ai-langchain-linux (3.12)	17s
server-ai-langchain-linux (3.10)	19s
server-ai-optimization-linux (3.13)	14s
server-ai-optimization-windows (3.12)	31s
server-ai-windows (3.13)	27s
server-ai-windows (3.10)	20s
server-ai-langchain-windows (3.11)	21s
server-ai-openai-windows (3.12)	23s
server-ai-openai-linux (3.12)	20s
server-ai-windows (3.11)	20s
server-ai-langchain-windows (3.10)	27s
server-ai-langchain-windows (3.13)	34s
server-ai-openai-linux (3.10)	22s
server-ai-openai-linux (3.11)	20s
server-ai-langchain-windows (3.12)	21s
server-ai-langchain-linux (3.11)	17s
server-ai-langchain-linux (3.13)	19s
server-ai-optimization-windows (3.11)	18s
server-ai-optimization-windows (3.10)	19s
	10m 40s

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