Increase max allowed length of fact schema's filter

Signed-off-by: Brian Fletcher <brian@roadie.io>

.changeset/nice-clocks-smash.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-tech-insights-backend': patch
+---
+
+Increase the maximum allowed length of an entity filter for tech insights fact schemas.

plugins/tech-insights-backend/migrations/20230925145017_increase_filter_fact_schemas_size.js

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2023 The Backstage Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const factSchemasTable = 'fact_schemas';
+
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.up = async function up(knex) {
+  await knex.schema.alterTable(factSchemasTable, table => {
+    table.text('entityFilter').alter();
+  });
+};
+
+/**
+ * @param { import("knex").Knex } knex
+ * @returns { Promise<void> }
+ */
+exports.down = async function down() {
+  await knex.schema.alterTable(factSchemasTable, table => {
+    table.string('entityFilter').alter();
+  });
+};