Simplify empty import selection evidence

records.go

@@ -192,16 +192,16 @@ type SourceInfo struct {
 	Label string
 	Path  string
 	// Destination is the effective mapping or sequence-container path. It is a
-	// detached snapshot. A fallback container is marked by DestinationUnresolved.
+	// detached snapshot. A fallback container is marked by DestinationIsFallback.
 	Destination Path
 	// PlacementMode describes how this source was placed. Mapping is the zero
 	// value; CLI and overlay sources report mapping placement unless item placement
 	// was applied to that source.
 	PlacementMode PlacementMode
-	// DestinationUnresolved marks Destination as the nearest resolved enclosing
+	// DestinationIsFallback marks Destination as the nearest resolved enclosing
 	// container when an enclosing item index is not yet assigned. It is false for
 	// exact destinations, including an item source's own sequence container.
-	DestinationUnresolved bool
+	DestinationIsFallback bool
 	Layer                 Layer
 	Kind                  SourceKind
 	UnderlayIndex         int
@@ -212,12 +212,12 @@ type SourceInfo struct {
 	// and failed loads, text is conservatively withheld; successful final source
 	// records reflect completed sensitivity classification.
 	VersionEvidence *SourceVersionEvidence
-	// ImportSelections records completed optional declarations that selected no
+	// EmptyImportSelections records completed optional declarations that selected no
 	// sources, in declaration order. Paths are local to this declaring source.
-	// Each record identifies the declaration mapping, selector, and empty outcome;
+	// Each record identifies the declaration mapping and selector;
 	// it does not list candidates or explain why a path was absent. Result, error,
 	// and callback snapshots detach these records and their paths.
-	ImportSelections []ImportSelection
+	EmptyImportSelections []EmptyImportSelection
 }
 
 // ImportSelector identifies the selector used by an import declaration.
@@ -232,22 +232,13 @@ const (
 	ImportSelectorGlob ImportSelector = "glob"
 )
 
-// ImportSelectionOutcome identifies the established result of import selection.
-type ImportSelectionOutcome string
-
-const (
-	// ImportSelectionNone means the optional declaration selected no sources.
-	ImportSelectionNone ImportSelectionOutcome = "none"
-)
-
-// ImportSelection records an optional import declaration that selected no
+// EmptyImportSelection records an optional import declaration that selected no
 // sources. Path is local to the declaring source; Location identifies its
 // declaration mapping and source ID.
-type ImportSelection struct {
+type EmptyImportSelection struct {
 	Path     Path
 	Location Location
 	Selector ImportSelector
-	Outcome  ImportSelectionOutcome
 }
 
 // SourceVersionEvidence describes a source-local version declaration observed