feat(deployment): Make serialization optional in FHEModelServer.run

[DeVikingMark]

Add force_serialization parameter to FHEModelServer.run method to make
serialization/deserialization optional. This allows for better performance
in cases where serialization is not needed.

• Add force_serialization parameter with default value False
• Update method documentation
• Modify serialization logic to consider both input state and force_serialization flag
• Remove TODO comment as the functionality is now implemented

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