Introduces the `DocumentCreateReadSQL` class in the
`EnvelopeGenerator.Application.SQL` namespace, implementing
the `ISQL<EnvelopeDocument>` interface. This class includes
a `Raw` property for a SQL query to insert and retrieve
documents, along with a static method `CreateParmas`
to generate `DynamicParameters` for SQL queries using
base64 encoded strings and envelope UUIDs.
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