[Bug]: Ducklake query view false when using Postgres Catalog

[meomeocoj]

What happened?

Here's the corrected grammar:
"The issue is that when I query the DuckLake view in a specific schema (let's say "gold"), I found that the DBIdentifierPreparer has a function _separate that seems to work incorrectly in the case of DuckLake with Postgres Catalog:

duckdb_engine/duckdb_engine/__init__.py

Lines 205 to 217 in 2745b00

	def _separate(self, name: Optional[str]) -> Tuple[Optional[Any], Optional[str]]:
	"""
	Get database name and schema name from schema if it contains a database name
	Format:
	<db_name>.<schema_name>
	db_name and schema_name are double quoted if contains spaces or double quotes
	"""
	database_name, schema_name = None, name
	if name is not None and "." in name:
	database_name, schema_name = (
	max(s) for s in re.findall(r'"([^.]+)"|([^.]+)', name)
	)
	return database_name, schema_name

For example:
"ducklake:postgres:db=ducklake ..." returns ducklake, ducklake (database, schema) which is incorrect."

DuckDB Engine Version

0.17.0

DuckDB Version

1.3.2

SQLAlchemy Version

1.39

Relevant log output

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[meomeocoj]

I have PR to detect the Ducklake extension mode, and default alias the database is ducklake at #1331. Please take a look @Mause