feat: track crawl run employee changes and verify dismissals

tests/test_admin_data.py

@@ -1,11 +1,12 @@
 from datetime import datetime, timezone
 
-from app.models import CrawlRun, Employee
+from app.models import CrawlError, CrawlRun, CrawlRunEmployeeChange, Employee
 from app.services.admin_data import (
     employee_detail_payload,
     employee_display_payload,
     format_admin_datetime,
     list_employees_page,
+    run_detail_payload,
     run_payload,
     stats_payload,
 )
@@ -207,3 +208,43 @@ def test_run_payload_calculates_progress():
     assert payload["processed_count"] == 5
     assert payload["progress_percent"] == 50.0
     assert payload["status_display"] == "Выполняется"
+
+
+def test_run_detail_payload_groups_changes_and_handles_old_runs(db_session):
+    old_run = CrawlRun(source_url="https://miem.hse.ru/persons", status="completed")
+    run = CrawlRun(source_url="https://miem.hse.ru/persons", status="completed", new_count=1)
+    employee = Employee(
+        profile_key="staff:new",
+        canonical_url="https://www.hse.ru/staff/new",
+        full_name="New Person",
+        status="active",
+        first_seen_at=datetime.now(timezone.utc),
+        last_seen_at=datetime.now(timezone.utc),
+    )
+    db_session.add_all([old_run, run, employee])
+    db_session.commit()
+    db_session.add(
+        CrawlRunEmployeeChange(
+            crawl_run_id=run.id,
+            employee_id=employee.id,
+            profile_key=employee.profile_key,
+            profile_url=employee.canonical_url,
+            full_name=employee.full_name,
+            change_type="new",
+            profile_available=True,
+            message="added",
+        )
+    )
+    db_session.add(
+        CrawlError(crawl_run_id=run.id, profile_url=employee.canonical_url, error_type="ValueError", message="bad")
+    )
+    db_session.commit()
+
+    payload = run_detail_payload(db_session, run)
+    old_payload = run_detail_payload(db_session, old_run)
+
+    assert payload["changes_detail_available"] is True
+    assert payload["changes"]["new"][0]["full_name"] == "New Person"
+    assert payload["errors"][0]["error_type"] == "ValueError"
+    assert old_payload["changes_detail_available"] is False
+    assert old_payload["changes"]["new"] == []