feat: 接口字段补 @Schema 中文说明 + 精简冗余字段 + 接入 Prometheus 监控

- 全部 VO 字段补 @Schema(description) 中文说明，在线文档字段可读
- AppEpisodeVO 精简 duration/isFree 冗余字段（保留 durationSec/locked）
- framework 引入 actuator + micrometer-registry-prometheus
- SecurityConfig 放行 /actuator/prometheus，双服务配置 management 暴露指标
- 新增 deploy/docker-compose.yml + prometheus.yml 监控部署配置

fruitshorts-framework/pom.xml

@@ -66,5 +66,15 @@
             <groupId>org.springdoc</groupId>
             <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
         </dependency>
+
+        <!-- 监控：暴露 actuator 指标供 Prometheus 抓取 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-actuator</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.micrometer</groupId>
+            <artifactId>micrometer-registry-prometheus</artifactId>
+        </dependency>
     </dependencies>
 </project>

fruitshorts-framework/src/main/java/com/fruitshorts/framework/security/SecurityConfig.java

@@ -48,7 +48,8 @@ public class SecurityConfig {
             "/swagger-ui/**",
             "/swagger-ui.html",
             "/v3/api-docs/**",
-            "/actuator/health"
+            "/actuator/health",
+            "/actuator/prometheus"
     };
 
     private final JwtAuthenticationFilter jwtAuthenticationFilter;