Materialize v0.75

v0.75.0

SQL

Support ALTER [ CLUSTER | SCHEMA ] SWAP, which allows atomically renaming clusters and schemas. This is useful in the context of Blue/Green deployments.
Change the semantics and schema of the mz_internal.mz_frontiers system catalog table, and add the mz_internal.mz_cluster_replica_frontiers system catalog table. These objects are mostly useful to support existing and upcoming features in Materialize.

Bug fixes and other improvements

Remove the requirement of USAGE privileges on types for SELECT and EXPLAIN statements.

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