Add property value range checks

[mikee47]

This PR ensures property values are clipped to the defined minimum/maximum range, for both Updater and streaming.

A variant (union) field has been added to PropertyInfo:

• For integers, this contains valid range (minimum, maximum). 64-bit values are store as optional pointers to reduce bloat
• For strings, this contains the default string

Other types obtain their default value from the object structure.

TODO:

• [x] Generate default, minimum, maximum for int64/uint64 values
• [x] Update tests