feature: add MIEM employees parser service with admin UI and MCP

tests/test_crawler.py

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+from datetime import datetime, timezone
+
+from app.models import Employee
+from app.services.crawler import _mark_dismissed
+
+
+def test_mark_dismissed_only_marks_missing_active_employees(db_session):
+    db_session.add(
+        Employee(
+            profile_key="staff:kept",
+            canonical_url="https://www.hse.ru/staff/kept",
+            status="active",
+            first_seen_at=datetime.now(timezone.utc),
+            last_seen_at=datetime.now(timezone.utc),
+        )
+    )
+    db_session.add(
+        Employee(
+            profile_key="staff:gone",
+            canonical_url="https://www.hse.ru/staff/gone",
+            status="active",
+            first_seen_at=datetime.now(timezone.utc),
+            last_seen_at=datetime.now(timezone.utc),
+        )
+    )
+    db_session.commit()
+
+    dismissed = _mark_dismissed(db_session, {"staff:kept"})
+
+    assert dismissed == 1
+    assert db_session.query(Employee).filter_by(profile_key="staff:kept").one().status == "active"
+    gone = db_session.query(Employee).filter_by(profile_key="staff:gone").one()
+    assert gone.status == "dismissed"
+    assert gone.dismissed_at is not None