feat(federation): correctness and parity fixes (composition + planner)#3025

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planner-improvements

Commits on Jun 26, 2026

docs(adr): decision records for federation planner-improvements

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fix(composition): accept @provides field sets over union- and interface-typed fields

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fix(composition): resolve multi-hop compound @key via nested entity gather

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test(router): end-to-end tests for the five federation fixes

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docs: reviewer guide for federation planner-improvements

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build: pin graphql-go-tools planner-improvements commit (router + router-tests)

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fix(composition): address review feedback

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docs: address review feedback

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build: bump graphql-go-tools pin to include planner review-feedback fixes

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Commits on Jun 28, 2026