chore: import upstream snapshot with attribution

tests/test_session/test_delete_purges_turn_errors.py

@@ -0,0 +1,40 @@
+"""Session delete purges yoyo-owned turn_errors rows (router_decisions precedent)."""
+
+from __future__ import annotations
+
+import sqlite3
+from pathlib import Path
+
+from opensquilla.persistence.migrator import apply_pending
+from opensquilla.session.models import SessionNode
+from opensquilla.session.storage import SessionStorage
+
+MIGRATIONS_DIR = Path(__file__).resolve().parents[2] / "migrations"
+
+
+async def test_delete_session_purges_turn_errors(tmp_path) -> None:
+    db = str(tmp_path / "sessions.db")
+    apply_pending(db, MIGRATIONS_DIR)
+    storage = SessionStorage(db)
+    await storage.connect()
+    try:
+        await storage.upsert_session(
+            SessionNode(session_key="agent:main:test:purge", session_id="sid-purge")
+        )
+        conn = sqlite3.connect(db)
+        conn.execute(
+            "INSERT INTO turn_errors (error_id, session_key, ts_ms) VALUES (?, ?, ?)",
+            ("abcd1234", "agent:main:test:purge", 1_000_000),
+        )
+        conn.commit()
+        conn.close()
+
+        await storage.delete_session("agent:main:test:purge")
+
+        conn = sqlite3.connect(db)
+        rows = conn.execute("SELECT * FROM turn_errors").fetchall()
+        conn.close()
+        assert rows == []
+        assert await storage.get_session("agent:main:test:purge") is None
+    finally:
+        await storage.close()