* feat: add serverless feature flag
Introduce a composite `serverless` feature flag that automatically enables
`write_segment_manifest` and `append_only_mutations` during initialization.
Co-authored-by: Cursor <cursoragent@cursor.com>
* refactor: rename serverless flag to serverless_compatible
Rename the composite feature flag for clarity and consistency with
serverless deployment terminology.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix: satisfy clippy field_reassign_with_default in flag tests
Use struct update syntax instead of mutating Default::default() fields.
Co-authored-by: Cursor <cursoragent@cursor.com>
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Co-authored-by: Cursor <cursoragent@cursor.com>
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