Revert "feat: add database to store conversation" #3305

Job	Run time
localization / generate_pot	58s
build_app / build_windows (x86)	2m 44s
style / ruff	6s
build_app / build_windows (x86_64)	2m 45s
localization / upload_on_crowdin	-1s
release	0s
	6m 32s

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