Fix incremental predicates

[mlilius]

Summary

Fix incremental_predicates option not being applied in merge strategy

Description

Fixes issue #306 where the incremental_predicates config option had no effect when using the merge incremental strategy.

Root Cause:
The incremental_predicates config was being read from the model configuration but wasn't being passed through to the merge SQL generation macro. The dbt_dremio_get_incremental_sql macro was hardcoded to pass incremental_predicates=none to the merge strategy, ignoring any predicates defined in the model config.

Changes Made:

1. Added incremental_predicates parameter to the dbt_dremio_get_incremental_sql macro signature in strategies.sql
2. Updated the materialization to pass incremental_predicates when calling dbt_dremio_get_incremental_sql in incremental.sql
3. Fixed the merge strategy call to use the passed incremental_predicates parameter instead of hardcoding none

Files Modified:

• dbt/include/dremio/macros/materializations/incremental/incremental.sql - Pass incremental_predicates to the SQL generation macro
• dbt/include/dremio/macros/materializations/incremental/strategies.sql - Accept and forward incremental_predicates parameter

Test Results

• Verified that incremental_predicates are now properly included in the MERGE statement's ON clause
• Tested with both single and multiple predicate configurations
• Confirmed backward compatibility (models without incremental_predicates continue to work as before)
• All existing incremental materialization tests pass

Changelog

• Added a summary of what this PR accomplishes to CHANGELOG.md

Contributor License Agreement

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Related Issue

#306 - incremental_predicates option has no effect