Cut metadata history over to shared model

internal/engine/inheritance_history.go

@@ -2,58 +2,10 @@ package engine
 
 import (
 	"slices"
-	"sort"
 
 	"gitea.maximumdirect.net/eric/ConfigKit/internal/document"
 )
 
-type inheritanceHistoryIndex struct {
-	paths pathPrefixIndex
-}
-
-func newInheritanceHistoryIndex(operations []inheritanceOperation) *inheritanceHistoryIndex {
-	if len(operations) == 0 {
-		return nil
-	}
-	index := &inheritanceHistoryIndex{}
-	for operationID, operation := range operations {
-		if operation.control != nil {
-			index.paths.insert(operation.control.path.String(), operationID)
-			continue
-		}
-		if operation.transfer != nil {
-			index.paths.insert(operation.transfer.to.String(), operationID)
-		}
-	}
-	return index
-}
-
-func (index *inheritanceHistoryIndex) matchingOperations(path Path, operations []inheritanceOperation) []inheritanceOperation {
-	if index == nil {
-		return operations
-	}
-	var ids []int
-	seen := make(map[int]struct{})
-	collect := func(id int) {
-		if _, found := seen[id]; found {
-			return
-		}
-		seen[id] = struct{}{}
-		ids = append(ids, id)
-	}
-	pointer := path.String()
-	index.paths.visitAncestors(pointer, collect)
-	index.paths.visitDescendants(pointer, collect)
-	sort.Ints(ids)
-	matching := make([]inheritanceOperation, 0, len(ids))
-	for _, id := range ids {
-		if id >= 0 && id < len(operations) {
-			matching = append(matching, operations[id])
-		}
-	}
-	return matching
-}
-
 // Retain source history at original paths. Structural operations are held once
 // per relationship and projected onto a requested destination path only when
 // History or Explain is queried.