Fix job ID extraction in immediate processing

- Job relationship returns job objects, not just IDs
- Extract ID property from job object before passing to processJobById()
- This fixes the '[object Object]' issue in logs and ensures job execution works

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/sendEmail.ts

@@ -182,9 +182,8 @@ export const sendEmail = async <TEmail extends BaseEmailDocument = BaseEmailDocu
 
       if (emailWithJobs.jobs && emailWithJobs.jobs.length > 0) {
         // Job found! Get the first job ID (should only be one for a new email)
-        jobId = Array.isArray(emailWithJobs.jobs)
-          ? String(emailWithJobs.jobs[0])
-          : String(emailWithJobs.jobs)
+        const firstJob = Array.isArray(emailWithJobs.jobs) ? emailWithJobs.jobs[0] : emailWithJobs.jobs
+        jobId = typeof firstJob === 'string' ? firstJob : String(firstJob.id || firstJob)
         logger.info(`Found job ID: ${jobId}`)
         break
       }