tech-insights-backend: fixed type assignment

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

.changeset/dull-nails-repeat.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-tech-insights-backend': patch
+---
+
+Fixed invalid access that caused an immediate crash with a `TypeError` when loading the package.

plugins/tech-insights-backend/src/service/persistence/TechInsightsDatabase.ts

@@ -28,7 +28,8 @@ import { DateTime } from 'luxon';
 import { Logger } from 'winston';
 import { parseEntityName, stringifyEntityRef } from '@backstage/catalog-model';
 import { isMaxItems, isTtl } from '../fact/factRetrievers/utils';
-import Transaction = Knex.Transaction;
+
+type Transaction = Knex.Transaction;
 
 export type RawDbFactRow = {
   id: string;