fix(restore): drop text search objects in the postgres --empty pre-clean

A schema shipping a custom text search dictionary (taiga's english_stem_nostop) survived the pre-clean and aborted the dump replay with a duplicate pg_ts_dict_dictname_index violation under ON_ERROR_STOP. The discovery SELECT now also enumerates user-owned pg_ts_config and pg_ts_dict entries. The string-assertion unit test is replaced by real scenario data in the e2e: the seeded schema now contains an overloaded f()/f(int) pair and the nostop dictionary plus configuration, and the restored database is queried to prove each survives the backup, pre-clean and replay cycle exactly once.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/unit/restore/test_postgres_empty_drop.py

@@ -1,57 +0,0 @@
-"""The --empty pre-clean drop must cover every object class a dump can
-re-CREATE ahead of tables; a missed class aborts the replay under
-ON_ERROR_STOP (OpenProject's ICU collation public.versions_name did)."""
-
-import tempfile
-import unittest
-from pathlib import Path
-from unittest import mock
-
-from baudolo.restore.db import postgres
-
-
-class TestPostgresEmptyDrop(unittest.TestCase):
-    def _drop_sql(self) -> str:
-        with tempfile.NamedTemporaryFile(suffix=".sql") as fh:
-            Path(fh.name).write_bytes(b"SELECT 1;\n")
-            with mock.patch.object(postgres, "docker_exec") as run:
-                postgres.restore_postgres_sql(
-                    container="c",
-                    db_name="db",
-                    user="u",
-                    password="p",
-                    sql_path=fh.name,
-                    empty=True,
-                )
-        first_call = run.call_args_list[0]
-        return first_call.kwargs["stdin"].decode()
-
-    def test_drop_covers_collations(self) -> None:
-        sql = self._drop_sql()
-        self.assertIn("pg_collation", sql)
-        self.assertIn("'COLLATION' AS type", sql)
-        self.assertIn("pg_get_userbyid(col.collowner) = current_user", sql)
-
-    def test_drop_still_covers_the_other_classes(self) -> None:
-        sql = self._drop_sql()
-        for marker in ("pg_class", "pg_proc", "'SEQUENCE' AS type", "'TYPE' AS type"):
-            self.assertIn(marker, sql)
-        self.assertIn("DROP %s IF EXISTS public.%s CASCADE", sql)
-
-    def test_functions_drop_with_identity_signature(self) -> None:
-        """Overloaded functions share a proname; a signature-less DROP aborts
-        with "function name is not unique", so the function branch must emit
-        name(identity args) while every other branch stays %I-quoted."""
-        sql = self._drop_sql()
-        self.assertIn("pg_get_function_identity_arguments(p.oid)", sql)
-        self.assertIn("format('%I(%s)', p.proname", sql)
-        for branch in (
-            "format('%I', c.relname)",
-            "format('%I', t.typname)",
-            "format('%I', col.collname)",
-        ):
-            self.assertIn(branch, sql)
-
-
-if __name__ == "__main__":
-    unittest.main()