fix(jira): correct ticket hierarchy — campaigns=Epic, all tests=Task

- Campaign issue type changed from Task to Epic (required to nest under
  Initiative OFS-20795 in classic Jira)
- Added customfield_10011 (Epic Name) — required when creating Epics
- Removed JIRA_ISSUE_TYPE_SUBTASK; all tests are now Task regardless of
  whether they are inside a campaign or standalone
- Standalone tests use the configured standalone parent (OFS-20798, an
  Epic) so Task→Task parent is never attempted
- Campaign tests use the campaign Epic key passed via parent_ticket_override

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/app/services/jira_service.py

@@ -406,9 +406,11 @@ def auto_create_campaign_issue(
             "description": _build_campaign_description(campaign),
             "issuetype": {"name": settings.JIRA_ISSUE_TYPE_CAMPAIGN},
             "labels": ["aegis", "campaign"],
+            # customfield_10011 = Epic Name (required for Epic type in classic Jira)
+            "customfield_10011": campaign.name,
         }
 
-        # Always nest under the configured parent ticket (e.g. OFS-9107)
+        # Nest under the configured parent ticket (Initiative, e.g. OFS-20795)
         if parent_ticket:
             fields["parent"] = {"key": parent_ticket}
 
@@ -478,24 +480,13 @@ def auto_create_test_issue(
     try:
         jira = get_user_jira_client(actor, db)
 
-        # Resolve parent and issue type together:
-        # - campaign parent override → Sub-task (Task cannot parent Task)
-        # - explicit standalone parent configured → Sub-task (same reason;
-        #   the standalone parent is a Task, e.g. OFS-20798)
-        # - only the general parent ticket (Epic) → Task
-        standalone_parent = get_jira_parent_ticket_standalone(db)
-        general_parent = get_jira_parent_ticket(db)
-        parent = parent_ticket_override or standalone_parent
-
-        has_explicit_parent = bool(
-            parent_ticket_override
-            or (standalone_parent and standalone_parent != general_parent)
-        )
-        issue_type = (
-            settings.JIRA_ISSUE_TYPE_SUBTASK
-            if has_explicit_parent
-            else settings.JIRA_ISSUE_TYPE_TEST
-        )
+        # All tests — whether inside a campaign or standalone — are created
+        # as Task.  Campaign tests use the campaign Jira key as parent
+        # (passed via parent_ticket_override); standalone tests use the
+        # configured standalone parent ticket (e.g. OFS-20798, which is an
+        # Epic so it can parent Tasks).
+        parent = parent_ticket_override or get_jira_parent_ticket_standalone(db)
+        issue_type = settings.JIRA_ISSUE_TYPE_TEST  # always Task
 
         fields: dict = {
             "project": {"key": project_key},