V1.9.0 release

[prdpsvs]

This pull request introduces several changes to the dbt project, focusing on incremental strategies, snapshot handling, and testing. The most significant changes include the addition of a new incremental strategy, updates to snapshot macros, and the inclusion of new tests for the microbatch strategy.

Incremental Strategies:

• Added a new incremental strategy named "microbatch" in the valid_incremental_strategies method of fabric_adapter.py and corresponding SQL macros. [1] [2] [3]

Snapshot Handling:

• Updated the fabric__build_snapshot_table and fabric__snapshot_staging_table macros to use configurable column names, enhancing flexibility and readability. [1] [2]
• Improved the fabric__snapshot_merge_sql macro to handle dynamic column names and added checks for dbt_valid_to_current. [1] [2]
• Modified snapshot.sql to integrate the new snapshot staging table logic and ensure proper column handling. [1] [2]

Testing:

• Introduced new tests for the microbatch incremental strategy in test_incremental_microbatch.py, including setup for input models and insertion of test data.

Miscellaneous:

• Corrected a variable name in columns.sql to ensure the correct SQL string is evaluated.

Copilot reviewed 4 out of 10 changed files in this pull request and generated no comments.

Files not reviewed (6)

• dbt/include/fabric/macros/adapters/columns.sql: Language not supported
• dbt/include/fabric/macros/materializations/models/incremental/incremental_strategies.sql: Language not supported
• dbt/include/fabric/macros/materializations/models/incremental/merge.sql: Language not supported
• dbt/include/fabric/macros/materializations/snapshots/helpers.sql: Language not supported
• dbt/include/fabric/macros/materializations/snapshots/snapshot.sql: Language not supported
• dbt/include/fabric/macros/materializations/snapshots/snapshot_merge.sql: Language not supported