refactor: #85 T8 extrait vaults-history-conflicts vers backend/routers (comportement inchange)
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"""Shared VaultWatcher handle (ROADMAP #85, tranche 8).
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Holder extrait de :mod:`backend.main` sans changement de comportement : le
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lifespan de ``main`` y dépose l'instance (``set_watcher``) et l'y reprend à
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l'extinction ; le router ``vaults`` la consulte via :func:`get_watcher`
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(démarrage/arrêt de surveillance à l'ajout/retrait dynamique de vault,
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état dans ``/api/vaults/status``).
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"""
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from __future__ import annotations
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from backend.watcher import VaultWatcher
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_watcher: VaultWatcher | None = None
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def get_watcher() -> VaultWatcher | None:
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"""Return the shared VaultWatcher instance (``None`` if disabled)."""
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return _watcher
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def set_watcher(watcher: VaultWatcher | None) -> None:
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"""Store (or clear) the shared VaultWatcher instance."""
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global _watcher
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_watcher = watcher
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