test(backend): add comprehensive tests for OAuth and agent endpoints

- Added tests for OAuth provider admin and consent endpoints covering edge cases.
- Extended agent-related tests to handle incorrect project associations and lifecycle state transitions.
- Introduced tests for sprint status transitions and validation checks.
- Improved multiline formatting consistency across all test functions.

backend/tests/api/routes/syndarix/test_edge_cases.py

@@ -74,7 +74,9 @@ async def terminated_agent(client, user_token, test_project, test_agent):
         f"/api/v1/projects/{test_project['id']}/agents/{test_agent['id']}",
         headers={"Authorization": f"Bearer {user_token}"},
     )
-    assert response.status_code == status.HTTP_200_OK, f"Failed to terminate: {response.json()}"
+    assert response.status_code == status.HTTP_200_OK, (
+        f"Failed to terminate: {response.json()}"
+    )
 
     # Return agent info with terminated status
     return {**test_agent, "status": "terminated"}
@@ -432,7 +434,7 @@ class TestProjectArchivingEdgeCases:
         agent_id = test_agent["id"]
 
         # Set agent to working status
-        status_response = await client.patch(
+        await client.patch(
             f"/api/v1/projects/{project_id}/agents/{agent_id}/status",
             json={"status": "working", "current_task": "Processing something"},
             headers={"Authorization": f"Bearer {user_token}"},
@@ -475,7 +477,6 @@ class TestConcurrencyEdgeCases:
 
         If two requests try to start sprints simultaneously, only one should succeed.
         """
-        import asyncio
         from datetime import date, timedelta
 
         project_id = test_project["id"]
@@ -509,7 +510,9 @@ class TestConcurrencyEdgeCases:
         )
 
         # Exactly one should succeed
-        successes = sum(1 for r in [start1, start2] if r.status_code == status.HTTP_200_OK)
+        successes = sum(
+            1 for r in [start1, start2] if r.status_code == status.HTTP_200_OK
+        )
         failures = sum(1 for r in [start1, start2] if r.status_code in [400, 409, 422])
 
         assert successes == 1, f"Expected exactly 1 success, got {successes}"
@@ -593,9 +596,7 @@ class TestDataIntegrityEdgeCases:
 
         assert update_response.status_code == status.HTTP_404_NOT_FOUND
 
-    async def test_assign_issue_to_other_projects_sprint(
-        self, client, user_token
-    ):
+    async def test_assign_issue_to_other_projects_sprint(self, client, user_token):
         """
         IDOR Test: Try to assign an issue to a sprint from a different project.
         """
@@ -624,6 +625,7 @@ class TestDataIntegrityEdgeCases:
 
         # Create a sprint in project 2
         from datetime import date, timedelta
+
         sprint_response = await client.post(
             f"/api/v1/projects/{p2['id']}/sprints",
             json={
@@ -662,7 +664,9 @@ class TestDataIntegrityEdgeCases:
             status.HTTP_400_BAD_REQUEST,
             status.HTTP_404_NOT_FOUND,
             status.HTTP_422_UNPROCESSABLE_ENTITY,
-        ], f"IDOR BUG: Assigned issue to another project's sprint! Status: {update_response.status_code}"
+        ], (
+            f"IDOR BUG: Assigned issue to another project's sprint! Status: {update_response.status_code}"
+        )
 
     async def test_assign_issue_to_other_projects_agent(
         self, client, user_token, superuser_token
@@ -744,7 +748,9 @@ class TestDataIntegrityEdgeCases:
             status.HTTP_400_BAD_REQUEST,
             status.HTTP_404_NOT_FOUND,
             status.HTTP_422_UNPROCESSABLE_ENTITY,
-        ], f"IDOR BUG: Assigned issue to another project's agent! Status: {update_response.status_code}"
+        ], (
+            f"IDOR BUG: Assigned issue to another project's agent! Status: {update_response.status_code}"
+        )
 
 
 @pytest.mark.asyncio
@@ -1084,6 +1090,6 @@ class TestArchiveProjectCleanup:
         # BUG CHECK: Sprint should be cancelled after project archive
         if sprint_data.get("status") == "active":
             pytest.fail(
-                f"BUG: Sprint status is still 'active' after project archive. "
-                f"Expected 'cancelled'. Archive should cancel active sprints."
+                "BUG: Sprint status is still 'active' after project archive. "
+                "Expected 'cancelled'. Archive should cancel active sprints."
             )