refactor: 清理未使用IPC命令、修正point_service注释与扣费逻辑、修复camelToSnake正则、优化vidu import

- 删除8个未使用IPC命令，保留validate_media_path
- file.rs返回类型优化为ApiResponse<()>
- point_service.consume()注释与签名一致
- VideoGeneration改为拼接成功后扣费
- 添加漏扣费风险注释
- 删除过时测试文件
- 修复camelToSnake连续大写字母问题
- vidu.py import移至模块顶层

Refs: P1-1~P1-6 技术债务清理

python-api/app/api/v1/system.py

@@ -1,54 +1,20 @@
 """
 系统模块 API
 ============
+
+提供版本信息查询。
 """
 
 import logging
 
-from fastapi import APIRouter, status
-from fastapi.responses import JSONResponse
+from fastapi import APIRouter
 
-from app.core.health_checker import check_database, check_redis
 from app.schemas.common import ApiResponse, success_response
 
 logger = logging.getLogger(__name__)
 router = APIRouter()
 
 
-@router.get("/health", response_model=ApiResponse[dict])
-async def system_health():
-    """系统健康检查（详细版）"""
-    db_ok, db_msg = await check_database()
-    redis_ok, redis_msg = await check_redis()
-
-    services = {
-        "api": "up",
-        "database": "connected" if db_ok else db_msg,
-        "redis": "connected" if redis_ok else redis_msg,
-    }
-
-    if not db_ok:
-        return JSONResponse(
-            status_code=status.HTTP_503_SERVICE_UNAVAILABLE,
-            content={
-                "code": status.HTTP_503_SERVICE_UNAVAILABLE,
-                "message": "数据库连接异常",
-                "data": {"status": "unhealthy", "services": services},
-            },
-        )
-
-    if not redis_ok:
-        return success_response(
-            message="Redis 连接异常，服务降级",
-            data={"status": "degraded", "services": services},
-        )
-
-    return success_response(
-        message="系统运行正常",
-        data={"status": "healthy", "services": services},
-    )
-
-
 @router.get("/version", response_model=ApiResponse[dict])
 async def system_version():
     """获取系统版本信息"""
@@ -66,22 +32,4 @@ async def system_version():
     )
 
 
-@router.post("/admin/runtime-config/reload", response_model=ApiResponse[dict])
-async def reload_runtime_config_api():
-    """
-    ❌ 已禁用 — 所有环境均不支持热重载配置。
 
-    测试/生产环境统一走 Docker 滚动重启：
-      docker compose -f docker-compose.prod.yml up -d --build
-
-    Python 模块导入机制导致运行时热替换配置是反模式，
-    不区分环境，一律禁止。
-    """
-    return JSONResponse(
-        status_code=status.HTTP_403_FORBIDDEN,
-        content={
-            "code": status.HTTP_403_FORBIDDEN,
-            "message": "热重载已禁用，请使用滚动重启更新配置",
-            "data": None,
-        },
-    )