[Bug] Constraint trigger incorrectly reported as non-deferrable/deferred

To reproduce:

1. Create a table and give it a `DEFERRABLE INITIALLY DEFERRED` constraint trigger.
2. Verify that the trigger is created successfully, with `tgdeferrable` and `tginitdeferred` both set to true in `pg_catalog.pg_trigger`.
3. View the table's definition in Postico's DDL view; observe that the DDL for the trigger trigger shows as `NOT DEFERRABLE`.

Postico Version 2.1.2 (9702)

No implementation file or test is named in the report. Start by reproducing the issue with a DEFERRABLE INITIALLY DEFERRED constraint trigger and inspect the DDL view output against pg_catalog.pg_trigger; done means the generated DDL preserves both deferrability settings.

Written by the indexing model from the issue text.