feat(importer): add ConvertedToTombstone counter (bd-wucl)

Track legacy deletions.jsonl entries converted to tombstones during import:
- Add Result.ConvertedToTombstone counter
- Add Result.ConvertedTombstoneIDs for the converted IDs
- Update test to verify the new counter

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/importer/importer.go

@@ -59,10 +59,12 @@ type Result struct {
 	ExpectedPrefix      string            // Database configured prefix
 	MismatchPrefixes    map[string]int    // Map of mismatched prefixes to count
 	SkippedDependencies []string          // Dependencies skipped due to FK constraint violations
-	Purged              int               // Issues purged from DB (found in deletions manifest)
-	PurgedIDs           []string          // IDs that were purged
-	SkippedDeleted      int               // Issues skipped because they're in deletions manifest
-	SkippedDeletedIDs   []string          // IDs that were skipped due to deletions manifest
+	Purged                int               // Issues purged from DB (found in deletions manifest)
+	PurgedIDs             []string          // IDs that were purged
+	SkippedDeleted        int               // Issues skipped because they're in deletions manifest
+	SkippedDeletedIDs     []string          // IDs that were skipped due to deletions manifest
+	ConvertedToTombstone  int               // Legacy deletions.jsonl entries converted to tombstones (bd-wucl)
+	ConvertedTombstoneIDs []string          // IDs that were converted to tombstones
 }
 
 // ImportIssues handles the core import logic used by both manual and auto-import.
@@ -164,10 +166,11 @@ func ImportIssues(ctx context.Context, dbPath string, store storage.Storage, iss
 					// Already have a tombstone for this ID in JSONL, skip
 					continue
 				}
-				// Check if we skipped this issue above (it was in JSONL but filtered out)
-				// If so, we should create a tombstone for it
+				// Convert this deletion record to a tombstone (bd-wucl)
 				tombstone := convertDeletionToTombstone(id, del)
 				filteredIssues = append(filteredIssues, tombstone)
+				result.ConvertedToTombstone++
+				result.ConvertedTombstoneIDs = append(result.ConvertedTombstoneIDs, id)
 			}
 
 			issues = filteredIssues

internal/importer/importer_test.go

@@ -1335,6 +1335,13 @@ func TestImportIssues_LegacyDeletionsConvertedToTombstones(t *testing.T) {
 	if result.SkippedDeleted != 1 {
 		t.Errorf("Expected 1 skipped deleted (issue in deletions.jsonl), got %d", result.SkippedDeleted)
 	}
+	// Verify ConvertedToTombstone counter (bd-wucl)
+	if result.ConvertedToTombstone != 1 {
+		t.Errorf("Expected 1 converted to tombstone, got %d", result.ConvertedToTombstone)
+	}
+	if len(result.ConvertedTombstoneIDs) != 1 || result.ConvertedTombstoneIDs[0] != "test-abc" {
+		t.Errorf("Expected ConvertedTombstoneIDs [test-abc], got %v", result.ConvertedTombstoneIDs)
+	}
 
 	// Verify regular issue was imported
 	issues, err := store.SearchIssues(ctx, "", types.IssueFilter{})