Merge branch 'main' into devin/1768432632-add-server-instructions

Author: aaronsteers

airbyte/_processors/sql/duckdb.py

@@ -95,7 +95,7 @@ class DuckDBSqlProcessor(SqlProcessorBase):
     so we insert as values instead.
     """
 
-    supports_merge_insert = False
+    supports_merge_insert = True  # DuckDB 1.4.0+ supports MERGE INTO natively
     file_writer_class = JsonlWriter
     sql_config: DuckDBConfig
 

airbyte/_processors/sql/motherduck.py

@@ -29,7 +29,7 @@
 class MotherDuckSqlProcessor(DuckDBSqlProcessor):
     """A cache implementation for MotherDuck."""
 
-    supports_merge_insert = False
+    supports_merge_insert = True  # MotherDuck runs on DuckDB 1.4.0+ with native MERGE INTO support
     file_writer_class = JsonlWriter
     cache: MotherDuckCache