Restructure code and use APScheduler for daemon functionality

app/jobs/routes.py

@@ -58,6 +58,23 @@ def download_job_input(job_id, job_input_id):
     )
 
 
+@bp.route('/<hashid:job_id>/log')
+@login_required
+@admin_required
+def job_log(job_id):
+    job = Job.query.get_or_404(job_id)
+    if job.status not in [JobStatus.COMPLETED, JobStatus.FAILED]:
+        flash(
+            f'Can\'t restart job "{job.title}": Status is not "Completed/Failed"',  # noqa
+            category='error'
+        )
+    return send_from_directory(
+        attachment_filename=f'job_{job.hashid}_log.txt',
+        directory=os.path.join(job.path, 'pipeline_data'),
+        filename=os.path.join('logs', 'pyflow_log.txt')
+    )
+
+
 @bp.route('/<hashid:job_id>/restart')
 @login_required
 @admin_required