v2.7.0 dbt_ad_reporting

PR #177 includes the following updates:

Schema/Data Changes (--full-refresh required after upgrading)

1 total change • 1 possible breaking change

Data Model(s)	Change type	Old	New	Notes
All models	source_relation column (when not using the union connections of the same type feature)	Empty string ('')	<database>.<schema>

Feature Updates

• Introduces the new (recommended) {connector_name}_sources variables for more robust union data configuration. The old {connector_name}_union_schemas and {connector_name}_union_databases variables will still be supported. See the README for specific details.

Upstream Dependency Changes

• Increases the required Amazon Ads package to version 1.3.0
• Increases the required Apple Search Ads package to version 1.3.0
• Increases the required Facebook Ads package to version 1.5.0
• Increases the required Google Ads package to version 1.4.0
• Increases the required LinkedIn Ads package to version 1.3.0
• Increases the required Microsoft Ads package to version 1.3.0
• Increases the required Pinterest Ads package to version 1.3.0
• Increases the required Reddit Ads package to version 1.5.0
• Increases the required Snapchat Ads package to version 1.3.0
• Increases the required TikTok Ads package to version 1.3.0
• Increases the required Twitter Ads package to version 1.3.0

Under the Hood

• Adds the fivetran_using_source_casing variable for case-sensitive destination support. When enabled, downstream transformations respect source casing to ensure consistent results. See the Additional Configurations section of the README for details.
• Introduces fivetran_utils.partition_by_source_relation to conditionally include source_relation in partition clauses only when multiple sources are configured.

Full Changelog: v2.6.1...v2.7.0