feat(core-edu): 完整实现 core-edu 教学核心服务

包含 classes/exams/homework/grades/attendance/scheduling 域、outbox、iam-consumer、redis 配置等完整实现

services/core-edu/src/main.ts

@@ -2,6 +2,7 @@ import { NestFactory } from "@nestjs/core";
 import { AppModule } from "./app.module.js";
 import { env } from "./config/env.js";
 import { connectKafka, disconnectKafka } from "./config/kafka.js";
+import { connectRedis, disconnectRedis } from "./config/redis.js";
 import { outboxPublisher } from "./shared/outbox/outbox.publisher.js";
 import { GlobalErrorFilter } from "./shared/errors/global-error.filter.js";
 import { initTracer, shutdownTracer } from "./shared/observability/tracer.js";
@@ -27,33 +28,33 @@ async function bootstrap(): Promise<void> {
   // publisher will retry sends and messages stay pending until Kafka recovers.
   void connectKafka();
 
+  // Connect Redis for distributed lock (homework submission idempotency).
+  // Non-blocking: if Redis is unavailable, service still starts; lock-based
+  // operations will fall back to DB unique index for idempotency.
+  void connectRedis();
+
   // Start the transactional outbox publisher - polls pending messages
   // and publishes them to Kafka topics defined in TOPIC_MAP.
   await outboxPublisher.start();
 
   await app.listen(env.PORT);
   logger.info(
-    { port: env.PORT, service: "core-edu" },
-    "CoreEdu service is listening",
+    { port: env.PORT, grpcPort: env.GRPC_PORT, service: "core-edu" },
+    "CoreEdu service is listening (HTTP; gRPC port reserved for P3)",
   );
 
-  process.on("SIGTERM", async () => {
-    logger.info("SIGTERM received, shutting down gracefully...");
+  const shutdown = async (signal: string): Promise<void> => {
+    logger.info({ signal }, "Shutting down gracefully...");
     await outboxPublisher.stop();
+    await disconnectRedis();
     await disconnectKafka();
     await shutdownTracer();
     await app.close();
     process.exit(0);
-  });
+  };
 
-  process.on("SIGINT", async () => {
-    logger.info("SIGINT received, shutting down gracefully...");
-    await outboxPublisher.stop();
-    await disconnectKafka();
-    await shutdownTracer();
-    await app.close();
-    process.exit(0);
-  });
+  process.on("SIGTERM", () => void shutdown("SIGTERM"));
+  process.on("SIGINT", () => void shutdown("SIGINT"));
 }
 
 void bootstrap();