feat(graph): PageRank centrality + per-file churn metrics#112

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andreinknv wants to merge 9 commits into

colbymchenry:mainfrom

andreinknv:feat/centrality-and-churn

Commits on Apr 27, 2026

refactor: per-language registry — eliminate cross-PR conflict surface

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fix(language-registry): TreeSitterExtractor reads from def.grammar.extractor

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refactor: per-tool MCP registry — eliminate tools[] + case-switch conflicts

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refactor: file-based migrations — eliminate version-collision bug class

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refactor: index-hook framework — eliminate per-pass CodeGraph mutations

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Merge branch 'refactor/mcp-tool-registry' into battle-test/all-shipped
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Merge branch 'refactor/migration-files' into battle-test/all-shipped
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Merge branch 'refactor/index-hooks' into battle-test/all-shipped
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feat: PR #112 (centrality + churn + hotspots) on top of refactors

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