Clarify PSQL_META_COMMANDS catch-all pattern handles PostgreSQL 17.6+ commands

The /^\\./i pattern is a catch-all that filters ANY backslash command,
including \restrict and \unrestrict introduced in PostgreSQL 17.6.

This clarifies that issues #322 and #326 are already resolved by the
PSQL_META_COMMANDS implementation from PR #329.

Related: #322, #326

Author: mnovelo

lib/apartment/adapters/postgresql_adapter.rb

@@ -167,7 +167,8 @@ class PostgresqlSchemaFromSqlAdapter < PostgresqlSchemaAdapter
         /^\\o/i,
         /^\\t/i,
         /^\\q/i,
-        /^\\./i, # end-of-copy delimiter
+        /^\\./i, # Catch-all for any backslash command (e.g., \. for COPY delimiter,
+                 # \restrict/\unrestrict in PostgreSQL 17.6+, and future meta-commands)
       ].freeze
 
       # Combined blacklist: SQL statements and psql meta-commands to filter from pg_dump output