time_left considers flexible data retention periods

Also update tests

app/main/views/jobs.py

@@ -399,6 +399,9 @@ def get_job_partials(job, template):
             counts=_get_job_counts(job),
             status=filter_args['status']
         )
+    service_data_retention_days = service_api_client.get_service_data_retention_by_notification_type(
+        current_service.id, template['template_type']
+    ).get('days_of_retention', current_app.config['ACTIVITY_STATS_LIMIT_DAYS'])
 
     return {
         'counts': counts,
@@ -415,7 +418,7 @@ def get_job_partials(job, template):
                 job_id=job['id'],
                 status=request.args.get('status')
             ),
-            time_left=get_time_left(job['created_at']),
+            time_left=get_time_left(job['created_at'], service_data_retention_days=service_data_retention_days),
             job=job,
             template=template,
             template_version=job['template_version'],

app/utils.py

@@ -338,12 +338,14 @@ def get_current_financial_year():
     return current_year if current_month > 3 else current_year - 1
 
 
-def get_time_left(created_at):
+def get_time_left(created_at, service_data_retention_days=7):
     return ago.human(
         (
-            datetime.now(timezone.utc).replace(hour=23, minute=59, second=59)
+            datetime.now(timezone.utc)
         ) - (
-            dateutil.parser.parse(created_at) + timedelta(days=8)
+            dateutil.parser.parse(created_at).replace(hour=0, minute=0, second=0) + timedelta(
+                days=service_data_retention_days + 1
+            )
         ),
         future_tense='Data available for {}',
         past_tense='Data no longer available',  # No-one should ever see this