Initialize FILETIME with DateTimeKind.Utc

[binarystorm]

Proposed changes

The FILETIME variable shall be initialized with DateTimeKind.Utc.
OPC UA expects timestamps to be in UTC: https://reference.opcfoundation.org/Core/Part3/v104/docs/8.38
The Kind property of DateTime is initialized to Unspecified and needs to be explicitly set to UTC.

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Further comments

Straight forward fix.