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Xuanwo
685cb01d6d
Function applications from the canonical remote contract cannot currently declare scalar or grouped computed-column outputs atomically. This adds the remote-only declaration contract for scalar, struct-as-one-column, and expanded named-struct outputs. It validates result mappings, fixes exact input/output Arrow schemas in the request, persists grouped sibling metadata, and keeps local Function execution unsupported. Unknown newer application or binding metadata remains readable, while schema-changing mutations fail closed instead of rewriting it. Stable Lance field IDs are deliberately not a declaration prerequisite in this slice. Inputs bind by parameter name and field path; Sophon remains responsible for exact-version validation, atomic all-NULL sibling creation, binding identity and revision allocation, and persisted output identities.