Reclassify as tooling (CUST-WP-0050 T02)

Apply the new 'tooling' category (reusable internal tooling/infrastructure)
from the Repo Classification Standard. First-pass agent classification.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.repo-classification.yaml

@@ -6,7 +6,7 @@ repo_classification:
   version: '1.0'
   classified_at: '2026-06-22'
   classified_by: agent
-  category: product
+  category: tooling
   domain: agents
   secondary_domains:
   - infotech