Add sdk/dist to CI artifact upload

productive-cli now depends on productive-sdk (for productive run).
Without uploading sdk/dist, downstream typecheck and test jobs fail
with 'Cannot find module @studiometa/productive-sdk'.

Co-authored-by: Claude <claude@anthropic.com>

Author: titouanmathis

.github/workflows/ci.yml

@@ -53,6 +53,7 @@ jobs:
           path: |
             packages/api/dist/
             packages/core/dist/
+            packages/sdk/dist/
             packages/cli/dist/
             packages/mcp/dist/