- Explicit casts to ensure exact match to pathman functions instead of pwning ones.- Explicit use of @extschema@ and pg_catalog schemas where possible (except for  operators).- Replace unsafe OR REPLACE clause.This is believed to remove the possibility of malicious internal functions overloading.For more information, see the documentation:37.17.6.2. Security Considerations for Extension Scripts (https://www.postgresql.org/docs/current/extend-extensions.html#EXTEND-EXTENSIONS-SECURITY)5.9.6. Usage Patterns (https://www.postgresql.org/docs/current/ddl-schemas.html#DDL-SCHEMAS-PATTERNS)