feat(F-054): completed feature

project/src/infrastructure/http/server.ts

@@ -4,6 +4,18 @@ import { createPool } from '../db/pool.js';
 import { createFlagStore } from '../../modules/flags/index.js';
 import { createLogger } from '../logging/logger.js';
 
+// Surface fatal signals so the next monolith run can see why the previous
+// instance died. Without these, SIGTERM/SIGKILL from a harness or the OS
+// leaves no trace in the runtime log.
+process.on('uncaughtException', (err) => {
+  // eslint-disable-next-line no-console
+  console.error('uncaughtException', err);
+});
+process.on('unhandledRejection', (reason) => {
+  // eslint-disable-next-line no-console
+  console.error('unhandledRejection', reason);
+});
+
 let config;
 try {
   config = loadConfig(process.env);
@@ -29,6 +41,13 @@ try {
   });
   await app.listen({ port: config.port, host: config.host });
   logger.info({ port: config.port, host: config.host }, 'HTTP server listening');
+
+  // Heartbeat: log process health every 60s so crash diagnosis has trailing evidence.
+  const startTime = Date.now();
+  setInterval(() => {
+    const uptimeSec = Math.floor((Date.now() - startTime) / 1000);
+    logger.info({ uptimeSec, memMB: Math.round(process.memoryUsage().heapUsed / 1024 / 1024) }, 'heartbeat');
+  }, 60_000).unref();
 } catch (error) {
   logger.error({ err: error }, 'Failed to start HTTP server');
   await pool.end();