docs: update example YAML files with domains, filter_column, and relationships

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: flyersworder

examples/revenue_agent/contract.yml

@@ -9,12 +9,15 @@ semantic:
     - schema: analytics
       tables: [orders, customers, subscriptions]
   forbidden_operations: [DELETE, DROP, TRUNCATE, UPDATE, INSERT]
+  domains:
+    revenue: [total_revenue, revenue_by_region]
   rules:
     - name: tenant_isolation
       description: "All queries must filter by tenant_id"
       enforcement: block
+      filter_column: tenant_id
     - name: use_semantic_revenue
-      description: "Revenue calculations must use the dbt metric definition"
+      description: "Revenue calculations must use the metric definitions"
       enforcement: warn
     - name: no_select_star
       description: "Must specify explicit columns"

examples/revenue_agent/semantic.yml

@@ -5,6 +5,7 @@ metrics:
     source_model: analytics.orders
     filters:
       - "status = 'completed'"
+
   - name: revenue_by_region
     description: "Revenue broken down by customer region"
     sql_expression: "SUM(o.amount) GROUP BY c.region"
@@ -34,6 +35,7 @@ tables:
       - name: created_at
         type: DATE
         description: "Order date"
+
   - schema: analytics
     table: customers
     columns:
@@ -49,3 +51,8 @@ tables:
       - name: tenant_id
         type: VARCHAR
         description: "Tenant identifier"
+
+relationships:
+  - from: analytics.orders.customer_id
+    to: analytics.customers.id
+    type: many_to_one