fix: emit CREATE VIEW when model type is view in SQL export (#1031)

[barry0451]

Fixes #1031

When a model has type: view in the data contract YAML, the SQL exporter was unconditionally emitting CREATE TABLE. This change makes the exporter emit CREATE VIEW (or CREATE OR REPLACE VIEW for Databricks) when the model's physicalType is view, matching the behavior of the dbt exporter.

Changes:

• In _to_sql_table(), check model.physicalType.lower() == 'view' and swap the DDL keyword accordingly
• Databricks uses CREATE OR REPLACE VIEW to align with Databricks best practices
• All column definitions, NOT NULL, PRIMARY KEY, and COMMENT clauses are preserved

Test:

• Added test_to_sql_ddl_postgres_view() with a dedicated view-based fixture