♻️ 重构 Discord 出站序列化 #167

Job	Run time
Test Coverage (3.10, windows-latest)	37s
Test Coverage (3.14, windows-latest)	42s
Test Coverage (3.13, macos-latest)	22s
Test Coverage (3.11, macos-latest)	23s
Test Coverage (3.12, macos-latest)	22s
Test Coverage (3.11, windows-latest)	39s
Test Coverage (3.13, windows-latest)	40s
Test Coverage (3.10, macos-latest)	48s
Test Coverage (3.14, ubuntu-latest)	20s
Test Coverage (3.14, macos-latest)	21s
Test Coverage (3.12, windows-latest)	38s
Test Coverage (3.12, ubuntu-latest)	18s
Test Coverage (3.11, ubuntu-latest)	17s
Test Coverage (3.13, ubuntu-latest)	23s
Test Coverage (3.10, ubuntu-latest)	20s
	7m 10s

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