feat: implement QuestionBank CRUD with pagination and template query

- Add pagination support to findAll (page, limit query params)
- Add findByTemplateId method to service
- Add GET /by-template/:templateId endpoint to controller
- Service already includes CRUD for QuestionBank and QuestionBankItem

.dockerignore

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+node_modules
+web/node_modules
+server/node_modules
+dist
+.git
+.env*
+.gemini
+.specify
+*.log