feat(engine): foreach (rfc-016) + native data source resolution (rfc-017)#511

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anneschuth wants to merge 36 commits into

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feat/foreach-implementation

Commits on Apr 24, 2026

docs: add RFC-016 Collection Operations (FOREACH)
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docs: improve RFC-016 based on review feedback
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docs: address all review feedback on RFC-016
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feat(engine): implement FOREACH collection operation (RFC-016)
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fix(engine): address FOREACH review feedback
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fix(engine): accept legal_basis on actions, add serde aliases for FOREACH
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fix: address review feedback on RFC-016 and FOREACH implementation
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fix(engine): validate FOREACH 'as' parameter against RFC-016 pattern
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feat(engine): lenient variable resolution and null propagation
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feat(engine): lenient variable resolution in context (return Null, not error)
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fix(engine): null propagation in dot notation and type checks
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fix(engine): lenient to_number (string coercion, null→0, bool→0/1)
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fix: load laws without source stripping, fix IN list refs
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fix(engine): IS_NULL treats empty arrays and objects as null
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fix: IS_NULL empty array/object = true, array data source key mapping
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feat(engine): date and string comparison in GREATER_THAN/LESS_THAN
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fix(engine): address review feedback on FOREACH, null handling, and type safety
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feat(engine): add EXISTS operation (not null AND not empty)
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feat: replace NOT(IS_NULL) with EXISTS in 33 YAML files
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fix(engine): skip Null values in numeric ADD instead of propagating
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fix: flatten object fields into local scope in FOREACH iterations
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feat: add GET operation and fix IN for Object/map values
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feat: add CONCAT operation for string concatenation
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docs: address PR #511 review comments on FOREACH implementation
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chore: remove unused data_sources scaffolding from CLI binary
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feat(engine): native data source resolution from YAML metadata
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fix(engine): IN with array subject is element-wise + select_on resolves cross-law
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feat(engine): apply type_spec.precision to numeric outputs
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feat(engine): type-default unresolved optional inputs
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test(engine): cover cross-law version selection via temporal.reference
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test(engine): pin FOREACH body resolution of CONCAT and outer scope
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fix(engine): keep eurocent half-even rounding regardless of precision
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fix(engine): topological input resolution order within an article
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fix(engine): skip legacy data registry for explicit regulation/output sources
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fix(engine): no legacy registry fallthrough when native source.table declared
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fix(engine): omit absent-column values from array query_native results
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