Add Jobs API for background task management

- Add JobsHandler with CreateJob and GetJobStatus endpoints
- Add jobs router with POST /api/jobs and GET /api/jobs/:jobId routes
- Integrate JobsHandler into main server and router config

internal/router/jobs.go

@@ -0,0 +1,10 @@
+package router
+
+func registerJobRoutes(cfg *Config) {
+	e := cfg.Echo
+	jwtMiddleware := createJWTMiddleware(cfg)
+	protected := e.Group("/api", jwtMiddleware)
+	jobs := protected.Group("/jobs")
+	jobs.POST("", cfg.JobsHandler.CreateJob)
+	jobs.GET("/:jobId", cfg.JobsHandler.GetJobStatus)
+}