refactor(shared): remove the legacy @databricks/sdk-experimental SDK

.oxlintrc.json

@@ -27,7 +27,7 @@
         "patterns": [
           {
             "group": ["@databricks/sdk-*", "@databricks/sdk-*/**"],
-            "message": "Import the Databricks SDK only through the wrapper in packages/shared/src/workspace-client (legacy.ts for @databricks/sdk-experimental, modular.ts for the modular @databricks/sdk-* packages). Add a re-export there if you need a new symbol."
+            "message": "Import the Databricks SDK only through the wrapper in packages/shared/src/workspace-client (modular.ts builds the modular @databricks/sdk-* clients). Add a re-export there if you need a new symbol."
           }
         ]
       }

CLAUDE.md

@@ -415,7 +415,7 @@ This project uses conventional commits (enforced by commitlint):
 ## Important Context
 
 ### Key Dependencies
-- `@databricks/sdk-experimental` v0.16.0 - Databricks services SDK
+- Modular `@databricks/sdk-*` packages - Databricks services SDK (isolated in `packages/shared/src/workspace-client/`)
 - `express` - HTTP server
 - `zod` - Runtime validation
 - `OpenTelemetry` - Observability (traces, metrics, logs)