feat: 完善短剧创作、技能目录与媒体任务恢复

保存原始创作输入，整合剧本打磨、分场规划与流式进度，接入审美及导演技能、角色声音和音乐；保持已批准媒体并完善请求去重与恢复。

统一增量 SQL 目录，补齐新安装字段并修正示例插入列，更新迁移说明；修复测试夹具与当前审阅、重启恢复行为的断言。验证：相关模块编译通过，短剧及 Atlas 回归 337 项、SSE 回归 3 项均通过。

docs/script/sql/update/2026-10-03-short-drama-original-idea.sql

@@ -0,0 +1,8 @@
+-- Store the exact creation input separately from generated project descriptions.
+-- Existing rows stay NULL unless their original request can be recovered.
+SET @original_idea_sql = (SELECT IF(COUNT(*) = 0,
+ 'ALTER TABLE short_drama_project ADD COLUMN original_idea LONGTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL COMMENT ''Original story creation input'' AFTER description',
+ 'SELECT 1') FROM information_schema.columns WHERE table_schema = DATABASE() AND table_name = 'short_drama_project' AND column_name = 'original_idea');
+PREPARE original_idea_stmt FROM @original_idea_sql;
+EXECUTE original_idea_stmt;
+DEALLOCATE PREPARE original_idea_stmt;