[BUG] Fusion does not respect db/schema overrides when previewing unsaved models

[sophieml]

Describe the bug
If attempting to preview an unsaved model (in dbt Studio), Fusion attempts to query the default specified database/schema, ignoring any database and schema overrides.

error: dbt1014: [Snowflake] 002003 (02000): SQL compilation error: Schema '<default_db>.NONE' does not exist or not authorized.

What version of dbt Fusion is this bug in? (find out by running dbt --version)
preview.45

Is this a discrepancy between the dbt Fusion Engine and dbt Core? Check one.

• YES
• NO

To Reproduce
generate_schema_name.sql:

{% macro generate_schema_name(custom_schema_name, node) -%}
    {{ custom_schema_name | trim }}
{%- endmacro %}

yml config (set env var to appropriate prefix):
folder structure - models/stg/schema_name/model.sql

models:
  project_name:
    stg:
      +database: "{{ env_var('DB_PREFIX') }}_stg"
      schema_name:
        +schema: "SCHEMA_NAME"
        +materialized: table

edit a model and attempt to preview without saving, observe above error

Expected behavior
previewing unsaved models works

Operating System and CPU Type (please complete the following information):
dbt Studio