Add documentation for data users to ensure they use BigInt when processing RPDE modified to prevent overflow in languages where the default integer type would overflow

[lukehesluke]

This is caused primarily by SQL Server’s timestamp or rowversion (as referenced here), which is cast to a SQL Server BIGINT on the way out of the db (SELECT CAST([version] AS BIGINT) FROM [dbo].[mytable])

Raise an issue for RPDE that limits the modified and id to be 64-bit if they are numbers (what to do for JS, C#, etc)

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Add to this branch of the gitbook project for dev docs 268 (https://app.gitbook.com/o/-LJTExWaXZFqcFJ_lZwF/s/-LOMz1IIOd5fl4xzfUYb/~/changes/268/using-data/harvesting-opportunity-data-1)

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Output:

• Developer docs: This is in the Harvesting Opportuniy data page in the dev docs PR #268 https://app.gitbook.com/o/-LJTExWaXZFqcFJ_lZwF/s/-LOMz1IIOd5fl4xzfUYb/~/changes/268/using-data/harvesting-opportunity-data
• RPDE issue: https://github.com/openactive/realtime-paged-data-exchange/issues/103

[lukehesluke]

This issue should be close-able when the draft https://app.gitbook.com/o/-LJTExWaXZFqcFJ_lZwF/s/-LOMz1IIOd5fl4xzfUYb/~/changes/268/using-data/harvesting-opportunity-data is merged

[nickevansuk]

Merged, looks great 👍