feat(liquibase-xml): add renameColumn, dropForeignKeyConstraint, dropPrimaryKey, dropUniqueConstraint, renameTable change types

These 5 DDL change types were missing from the XML fallback parser, causing
catalog state divergence and incorrect findings when the bridge JAR is
unavailable. Each generates the correct SQL that flows through pg_query
like all other change types.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: 2 people