Refactor brand service and related components

- Removed ListQuestionVersions method and associated types from BrandService and Queries.
- Updated PromptRuleGenerationService to change task naming and handling.
- Enhanced ScheduleTaskService to support filtering by created date range and keyword.
- Introduced InstantTaskService for managing instant tasks with appropriate filtering and response structures.
- Added InstantTaskHandler for handling API requests related to instant tasks.
- Created InstantTaskTab component for the admin web interface to display and manage instant tasks.
- Updated database migrations to rename source types for articles and generation tasks.
- Adjusted models and repository queries to reflect the removal of question version handling.

server/migrations/20260402120000_rename_prompt_rule_source_type_to_custom_generation.down.sql

@@ -0,0 +1,7 @@
+UPDATE articles
+SET source_type = 'prompt_rule'
+WHERE source_type = 'custom_generation';
+
+UPDATE generation_tasks
+SET task_type = 'prompt_rule'
+WHERE task_type = 'custom_generation';

server/migrations/20260402120000_rename_prompt_rule_source_type_to_custom_generation.up.sql

@@ -0,0 +1,7 @@
+UPDATE articles
+SET source_type = 'custom_generation'
+WHERE source_type = 'prompt_rule';
+
+UPDATE generation_tasks
+SET task_type = 'custom_generation'
+WHERE task_type = 'prompt_rule';