docs(api): track remaining procedure-support slices

docs/api-router-procedure-support-backlog.md

@@ -0,0 +1,36 @@
+# API Router Procedure-Support Backlog
+
+Status as of 2026-03-31.
+
+Done
+- `rate-card`
+- `effort-rule`
+- `experience-multiplier`
+- `management-level`
+- `blueprint`
+- `client`
+- `country`
+- `holiday-calendar`
+
+Ready next
+- `dispo`
+- `insights`
+- `import-export`
+- `org-unit`
+
+Deferred or blocked
+- `assistant-tools`
+- `chargeability-report`
+- `dashboard`
+- `entitlement`
+- `notification`
+- `resource-read-shared`
+- `resource-summary-read`
+- `user`
+- `timeline-router` tests
+- `vacation-router` tests
+
+Notes
+- Router files should contain only tRPC wiring.
+- Procedure orchestration and router input schemas belong in `*-procedure-support.ts`.
+- Pure builders and domain helpers remain in existing `*-support.ts` modules.