v0.27.1:0 - fix model download: prepend ~/.local/bin so SSH finds uvx

hf-download.sh shells out to uvx (the uv installer drops it in ~/.local/bin),
but the non-interactive SSH session doesn't source the user's profile, so
~/.local/bin was off PATH and downloads died with "uvx: command not found".
build_download_command now prepends $HOME/.local/bin. Adds test_download.py.

package/startos/versions/v0_1_0.ts

@@ -1,10 +1,10 @@
 import { VersionInfo, IMPOSSIBLE } from '@start9labs/start-sdk'
 
 export const v0_1_0 = VersionInfo.of({
-  version: '0.27.0:0',
+  version: '0.27.1:0',
   releaseNotes: {
     en_US:
-      'v0.27.0:0 — settings move into the dashboard, plus two bug fixes. (1) New ⚙ Settings gear in the dashboard: all the optional cluster knobs — vLLM and support-service ports, container names, Parakeet/Kokoro/embeddings/Qdrant hosts, Open WebUI link, NGC key, swap webhook — are now edited here, in plain English, and apply immediately without a restart. The StartOS "Configure Sparks" action is now just the four required fields (two Spark IPs + SSH users); your existing optional values migrate into the gear automatically on first launch, and the settings are stored on the server and included in StartOS backups. (2) NEW: support-service ports are now configurable. If your vLLM runs on 8000 (vLLM\'s own default) and you moved Parakeet to another port, set them under ⚙ Settings → that fixes the false "vLLM down" and the Parakeet 404 some setups saw. (3) Bug fix: GET /api/swap/lock returned 404 (a routing bug where it was shadowed by the swap-job lookup); the swap reservation status now reads correctly. No breaking consumer-API changes; the /v1 proxy and swap API are unchanged.',
+      'v0.27.1:0 — bug fix: "Download a new model" now works on its own. The downloader on the Spark relies on a helper tool (uvx, part of Astral\'s uv) that the standard installer places under your home directory in ~/.local/bin. Spark Control runs downloads over an automated SSH session that wasn\'t looking there, so a download failed immediately with "uvx: command not found" even though the tool was installed. Spark Control now includes ~/.local/bin on the path when it runs a download, so the Download button works with no manual setup. No other changes; the /v1 proxy, swap, and coordination APIs are unchanged.',
   },
   migrations: {
     up: async ({ effects }) => {},