fix(dbt): Configure source schema to resolve test failures

Add 'schema: main' to source definition so dbt tests can find the
seed tables. Without this, source tests were looking for tables in
a non-existent 'raw_data' schema, causing 7 test failures.

Result: All 15 dbt tests now pass (PASS=15 WARN=0 ERROR=0)
Signed-off-by: roller100 (BearingNode) <[email protected]>

Author: roller100 (BearingNode)

producer/dbt/runner/models/schema.yml

@@ -3,6 +3,7 @@ version: 2
 sources:
   - name: raw_data
     description: Raw CSV data files
+    schema: main
     tables:
       - name: raw_customers
         description: Raw customer data