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Xuanwo
a417e46bfa
Functions can describe their Python environment today, but cannot declare accelerator requirements. That prevents Sophon from scheduling computed-column UDF refreshes onto GPU workers from the immutable Function definition. Add `num_gpus` to Python `@udf` through a typed `FunctionResourceRequirements` value and represent resource-aware definitions with the `python_v2` runtime discriminator. CPU Functions retain their existing `python` encoding and canonical identity. The new discriminator is intentional for mixed-version safety: deployments that do not understand execution resources reject the runtime instead of accepting a new field and silently running the Function on CPU. Required resources are part of Function version identity; priority, concurrency, and retry policy remain Job concerns. The actual resource scheduling remains owned by Sophon.