Generate fluent API for IDENTITY seed and increment

[bricelam]

Some questions that have come up:

• What happens in migrations when you change the seed or increment values?
• Does the model snapshot call the fluent API?
• Should the two model annotations be consolidated into one?

[ajcvickers]

@bricelam

What happens in migrations when you change the seed or increment values?

What do we do for sequences?

Does the model snapshot call the fluent API?

We can do this later without it being breaking, right?

Should the two model annotations be consolidated into one?

Seems like you did this in the PR, or is this something different?

[bricelam]

What happens in migrations when you change the seed or increment values?

What do we do for sequences?

There is SQL to alter and reset them.

Does the model snapshot call the fluent API?

We can do this later without it being breaking, right?

Yes, but we’ll have to special case the existing annotations forevermore

Should the two model annotations be consolidated into one?

Seems like you did this in the PR, or is this something different?

I only did it in Migration operations, we could do the same in the model

[ajcvickers]

Split out #16964 and #16965 to backlog; leaving this in 3.0.

[bricelam]

Looks like we haven't yet provided a hook for providers to handle annotations in the model snapshot.

[lajones]

Poaching