feat: implement autonomous Bybit demo trading agent

tests/test_database.py

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+from pathlib import Path
+
+from llm_trade_bot.database import Database
+
+
+async def test_notes_and_admin_deduplication(tmp_path: Path):
+    database = Database(tmp_path / "state.db")
+    await database.open()
+    try:
+        await database.add_note("first")
+        await database.add_note("second")
+        assert await database.recent_notes(10, 100) == ["first", "second"]
+        first_id, first_queued = await database.add_admin_request("Need a new data feed")
+        second_id, second_queued = await database.add_admin_request("Need a new data feed")
+        assert first_queued is True
+        assert second_queued is False
+        assert second_id == first_id
+        outbox = await database.pending_outbox()
+        assert len(outbox) == 1
+        assert outbox[0].kind == "ask_admin"
+    finally:
+        await database.close()
+
+
+async def test_run_lifecycle(tmp_path: Path):
+    database = Database(tmp_path / "state.db")
+    await database.open()
+    try:
+        run_id = await database.start_run("test")
+        await database.add_event("tool_started", {"name": "note"}, run_id)
+        await database.finish_run(run_id, status="completed", summary="idle")
+        last = await database.last_run()
+        assert last is not None
+        assert last["status"] == "completed"
+        assert last["summary"] == "idle"
+    finally:
+        await database.close()