feat: Add CloudFormation Language Extensions support (Fn::ForEach)#8637

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bnusunny wants to merge 13 commits intodevelopfrom

feat-language-extension

Commits on Mar 18, 2026

feat: add CloudFormation Language Extensions processing library
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feat: integrate language extensions into SAM CLI
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feat: add language extensions support to sam build
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feat: add language extensions support to sam package and deploy
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test: add validate, local invoke, and start-api integration tests
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feat: add telemetry tracking for CloudFormation Language Extensions
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test: trim language extensions integration tests to essential cases
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fix: Fn::Equals uses string comparison to match CloudFormation behavior
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fix: scope intrinsic resolution to Resources, Conditions, and Outputs only
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refactor: rename iter_resources to iter_regular_resources
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refactor: deduplicate _to_boolean and fix TOCTOU in expansion cache
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test: remove integration tests referencing deleted test data
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refactor: address PR review comments on style and test quality
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