feat(issue summary) Receive optional possible cause scores (#84346)

<!-- Describe your PR here. -->
schema from
[here](https://github.com/getsentry/seer/blob/696452da11113cec497029bfb92339d7660ead8d/src/seer/automation/summarize/models.py#L17-L28)
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src/sentry/api/endpoints/group_ai_summary.py

@@ -33,12 +33,18 @@
 from rest_framework.request import Request
 
 
+class SummarizeIssueScores(BaseModel):
+    possible_cause_confidence: float
+    possible_cause_novelty: float
+
+
 class SummarizeIssueResponse(BaseModel):
     group_id: str
     headline: str
     whats_wrong: str | None = None
     trace: str | None = None
     possible_cause: str | None = None
+    scores: SummarizeIssueScores | None = None
 
 
 @region_silo_endpoint

tests/sentry/api/endpoints/test_group_ai_summary.py

@@ -3,7 +3,11 @@
 
 import orjson
 
-from sentry.api.endpoints.group_ai_summary import GroupAiSummaryEndpoint, SummarizeIssueResponse
+from sentry.api.endpoints.group_ai_summary import (
+    GroupAiSummaryEndpoint,
+    SummarizeIssueResponse,
+    SummarizeIssueScores,
+)
 from sentry.api.serializers.rest_framework.base import convert_dict_key_case, snake_to_camel_case
 from sentry.testutils.cases import APITestCase, SnubaTestCase
 from sentry.testutils.helpers.features import apply_feature_flag_on_cls
@@ -37,6 +41,10 @@ def test_ai_summary_get_endpoint_with_existing_summary(self, mock_call_seer):
             "whats_wrong": "Existing whats wrong",
             "trace": "Existing trace",
             "possible_cause": "Existing possible cause",
+            "scores": {
+                "possible_cause_confidence": 0.9,
+                "possible_cause_novelty": 0.8,
+            },
         }
 
         # Set the cache with the existing summary
@@ -82,6 +90,10 @@ def test_ai_summary_get_endpoint_without_existing_summary(
             whats_wrong="Test whats wrong",
             trace="Test trace",
             possible_cause="Test possible cause",
+            scores=SummarizeIssueScores(
+                possible_cause_confidence=0.0,
+                possible_cause_novelty=0.0,
+            ),
         )
         mock_call_seer.return_value = mock_summary
         mock_get_connected_issues.return_value = [self.group, self.group]
@@ -126,6 +138,10 @@ def test_ai_summary_call_seer(self, mock_get_event, mock_post):
             "trace": "Test trace",
             "possible_cause": "Test possible cause",
             "headline": "Test headline",
+            "scores": {
+                "possible_cause_confidence": 0.9,
+                "possible_cause_novelty": 0.8,
+            },
         }
         mock_post.return_value = mock_response
 
@@ -230,6 +246,10 @@ def test_call_seer_payload(self):
                 "trace": "Test trace",
                 "possible_cause": "Test possible cause",
                 "headline": "Test headline",
+                "scores": {
+                    "possible_cause_confidence": 0.9,
+                    "possible_cause_novelty": 0.8,
+                },
             }
 
             self.client.post(self.url, format="json")