Fix re-parenting an agent interrupts its state machine #723

Job	Run time
⚙️ Static checks	13s
🧪 Unit tests	3m 2s
cache-env	1s
🍎 macOS / Editor (x86_64, release)	3m 9s
🪟 Windows / Editor (x86_64, release)	9m 3s
🍎 macOS / Editor (arm64, release)	3m 29s
🐧 Linux / Editor (x86_64, release)	15m 5s
🔌 GDExtension / 🐧 Linux (x86_64, release)	33s
🐧 Linux / Template (x86_64, release)	9m 35s
🔌 GDExtension / 🐧 Linux (x86_64, debug)	28s
🐧 Linux / Editor .NET (x86_64, release)	17m 6s
🔌 GDExtension / 🪟 Windows (x86_64, release)	2m 58s
🔌 GDExtension / 🪟 Windows (x86_64, debug)	2m 42s
🔌 GDExtension / 🍎 macOS (universal, release)	1m 10s
🔌 GDExtension / 🍎 macOS (universal, debug)	55s
🔌 GDExtension / 📦 Package extension	28s
🍎 macOS / Make macOS Bundles (tmp-macos, false, true)	40s
	1h 10m 37s

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