Escape colons in Lunr search query filters

Signed-off-by: Jesse Bye <jbye@riskalyze.com>

.changeset/short-numbers-carry.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-search-backend-node': patch
+---
+
+Escape : characters in the query

plugins/search-backend-node/src/engines/LunrSearchEngine.ts

@@ -57,6 +57,9 @@ export class LunrSearchEngine implements SearchEngine {
         .map(([field, value]) => {
           // Require that the given field has the given value (with +).
           if (['string', 'number', 'boolean'].includes(typeof value)) {
+            if (typeof value === 'string') {
+              return ` +${field}:${value.replace(':', '\\:')}`;
+            }
             return ` +${field}:${value}`;
           }