perf: cache getConfig (#9377)

* cache `getConfig`

* critical fix

Co-authored-by: Daniel Dietzler <36593685+danieldietzler@users.noreply.github.com>

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Co-authored-by: Daniel Dietzler <36593685+danieldietzler@users.noreply.github.com>

server/src/interfaces/database.interface.ts

@@ -20,6 +20,7 @@ export enum DatabaseLock {
   StorageTemplateMigration = 420,
   CLIPDimSize = 512,
   LibraryWatch = 1337,
+  GetSystemConfig = 69,
 }
 
 export const extName: Record<DatabaseExtension, string> = {