Sqlite Identity column is required to be int32

Describe the bug

Sqlite code generator seems to require that Identity column must be Int32 - in which case it will be defined as autoincrement. I can’t find any reason for this in the documentation. In fact, the sqlite doc says that primary autoincrement key will be mapped to the hidden ROWID column, which is 64 bit. So there is no reason that the code generator shouldn’t accept Int64 at least. The relevant code line:

https://github.com/fluentmigrator/fluentmigrator/blob/9c87d698b161b3a1bb596a5624c02891a64459c5/src/FluentMigrator.Runner.SQLite/Generators/SQLite/SQLiteColumn.cs#L34

Sqlite doc:

https://sqlite.org/autoinc.html

To Reproduce In a migration define a column like this:

        this.Create.Table("TestTable")
            .WithColumn("Id").AsInt64().PrimaryKey().Identity()

And run a migration for Sqlite

Expected behavior

New table successfully generated.

Information (please complete the following information):

• OS: Ubuntu 20.04
• Platform .net5
• FluentMigrator version latest
• FluentMigrator runner [ FluentMigrator.Console ]
• Database Management System [ SQLite ]
• Database Management System Version [ N/A ]

[zelenij]

I’ll be happy to create a PR to address this problem.

[zelenij]

It’s not too urgent for me, so feel free to overhaul…