Add create sequence in invites_table.go in syncapi

[PC25]

Fixes #723
Signed-off-by: Pushpam [email protected]

[neilalexander]

Since these sequences are scoped to the database and not to the table, is it not unnecessary to add another CREATE SEQUENCE IF NOT EXISTS line since it will be practically ignored anyway?

$ git grep syncapi_stream_id | grep CREATE
syncapi/storage/postgres/account_data_table.go:CREATE SEQUENCE IF NOT EXISTS syncapi_stream_id;
syncapi/storage/postgres/output_room_events_table.go:CREATE SEQUENCE IF NOT EXISTS syncapi_stream_id;

[kegsay]

Yes, but for documentation purposes it is nice to see what that mysterious sequence is. It doesn't have to be done on a per-table basis, but we don't really have anywhere to put DB-level SQL statements.

I'm going to make an executive decision and say that we should probably have a place for DB-level SQL statements (the file which implements the storage interface), rather than dupe this everywhere and have it be a pain to update later. This makes this issue null and void, and #963 A Thing.