v4.5.0

Real schema support:

• Schemas coexist — same-named tables in different schemas are now
  distinct objects (a.t and b.t no longer collide). Public-schema
  behavior and existing data directories are unchanged (fully backward
  compatible).
• search_path is honored per session — SET/SHOW/RESET search_path
  work over the wire and embedded; bare names resolve to the session's
  schema, falling back to public; connection isolation guaranteed (two
  connections with different search_paths cannot see each other's
  resolution).
• Schema DDL — CREATE SCHEMA [IF NOT EXISTS] registers (duplicates
  error); DROP SCHEMA [IF EXISTS] … RESTRICT|CASCADE (cascade drops member
  tables, composing with the partition-child cascade); ALTER TABLE … SET SCHEMA moves tables between schemas.
• Deferred constraints — SET CONSTRAINTS {ALL|names} {DEFERRED| IMMEDIATE} implemented (wire + embedded); column-level INITIALLY DEFERRED honored; deferred FK checks validate at COMMIT and evaporate if
  the referenced table was dropped in-transaction (PG parity).
• Introspection — information_schema reports real table_schema
  values; pg_class.relname stays bare.
• Fix (wrong-data, pre-existing): the first INSERT after any
  ALTER TABLE … RENAME silently overwrote the oldest row (volatile row
  counter was not migrated with the rename).
• Fix (pre-existing): cross-type foreign keys (e.g. int8 child
  referencing int4 parent) reported phantom violations on the indexed
  fast path; probe values now coerce to the referenced columns' types.
• Measured on the PG regression corpus: +158 statements flip to passing;
  ~60 prior "passes" that depended on cross-schema name collisions now
  correctly error (they were silently operating on the wrong tables).