breaking: Switching default for notebook upload flag (#1248)

### Description

Switches the default for the flag for notebook upload path to True

### Checklist

- [ ] I have run this code in development and it appears to resolve the
stated issue
- [ ] This PR includes tests, or tests are not required/relevant for
this PR
- [ ] I have updated the `CHANGELOG.md` and added information about my
change to the "dbt-databricks next" section.

Author: benc-db

CHANGELOG.md

@@ -39,6 +39,7 @@
 - **BREAKING:** Removing the 'use_info_schema_for_columns' behavior flag, as we have a better mechanism for getting complex type information - DESCRIBE EXTENDED ... AS JSON. This is a breaking change because it requires a modern DBR (or SQL Warehouse) in order to function ([1226](https://github.com/databricks/dbt-databricks/pull/1226))
 - Use atomic `CREATE OR REPLACE` instead of DROP + CREATE for managed Iceberg tables
 - Drop support for python 3.9, adds 3.13 ([1240](https://github.com/databricks/dbt-databricks/pull/1240))
+  -- **BREAKING:** Flipping the default for USE_USER_FOLDER_FOR_PYTHON to true ([1248](https://github.com/databricks/dbt-databricks/pull/1248))
 
 ## dbt-databricks 1.10.14 (October 22, 2025)
 

dbt/adapters/databricks/impl.py

@@ -104,7 +104,7 @@
 
 USE_USER_FOLDER_FOR_PYTHON = BehaviorFlag(
     name="use_user_folder_for_python",
-    default=False,
+    default=True,
     description=(
         "Use the user's home folder for uploading python notebooks."
         "  Shared folder use is deprecated due to governance concerns."