chore: add inMemoryScheduledChangeRequests flag (#6151)

What it says on the box

Closes #
[1-2030](https://linear.app/unleash/issue/1-2030/create-inmemoryscheduledchangerequests-flag)

---------

Signed-off-by: andreas-unleash <andreas@getunleash.ai>

src/lib/__snapshots__/create-config.test.ts.snap

@@ -114,6 +114,7 @@ exports[`should create default config 1`] = `
       },
       "filterInvalidClientMetrics": false,
       "googleAuthEnabled": false,
+      "inMemoryScheduledChangeRequests": false,
       "incomingWebhooks": false,
       "increaseUnleashWidth": false,
       "maintenanceMode": false,

src/lib/types/experimental.ts

@@ -47,6 +47,7 @@ export type IFlagKey =
     | 'feedbackComments'
     | 'createdByUserIdDataMigration'
     | 'showInactiveUsers'
+    | 'inMemoryScheduledChangeRequests'
     | 'useMemoizedActiveTokens';
 
 export type IFlags = Partial<{ [key in IFlagKey]: boolean | Variant }>;
@@ -232,6 +233,10 @@ const flags: IFlags = {
         process.env.UNLEASH_EXPERIMENTAL_MEMOIZED_ACTIVE_TOKENS,
         false,
     ),
+    inMemoryScheduledChangeRequests: parseEnvVarBoolean(
+        process.env.UNLEASH_EXPERIMENTAL_IN_MEMORY_SCHEDULED_CHANGE_REQUESTS,
+        false,
+    ),
 };
 
 export const defaultExperimentalOptions: IExperimentalOptions = {