Segmentation stage 1

src/dataflux/state.py

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+# Copyright (C) 2026 Hector van der Aa <hector@h3cx.dev>
+# Copyright (C) 2026 Association Exergie <association.exergie@gmail.com>
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from dataclasses import dataclass, field
+from threading import Lock, Thread
+from serial import Serial
+
+@dataclass
+class AppState:
+    running: bool = True
+
+    serial_port: Serial | None = None
+    serial_thread: Thread | None = None
+
+    telemetry_thread: Thread | None = None
+
+    lock: Lock = field(default_factory=Lock)