chore(cli): bump version and update @treeseed/sdk

Changes:
- Update package version to 0.6.39-dev.staging.20260508T100359Z in
  package.json and package-lock.json
- Update @treeseed/sdk dependency to
  github:treeseed-ai/sdk#0.6.43-dev.staging.20260508T100339Z in
  package.json and package-lock.json

Dependency and pointer updates:
- dependencies.@treeseed/sdk: 0.6.42 ->
  github:treeseed-ai/sdk#0.6.43-dev.staging.20260508T100339Z

Author: adrianwebb

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@treeseed/cli",
-  "version": "0.6.38",
+  "version": "0.6.39-dev.staging.20260508T100359Z",
   "description": "Operator-facing Treeseed CLI package.",
   "license": "AGPL-3.0-only",
   "repository": {
@@ -45,7 +45,7 @@
     "release:publish": "node ./scripts/run-ts.mjs ./scripts/publish-package.ts"
   },
   "dependencies": {
-    "@treeseed/sdk": "0.6.42",
+    "@treeseed/sdk": "github:treeseed-ai/sdk#0.6.43-dev.staging.20260508T100339Z",
     "ink": "^7.0.0",
     "react": "^19.2.5"
   },