v0.2.2: BUILD_FAILED pull failure aborts redeploy with clear message

Remove contextlib.suppress from the image pull step in the BUILD_FAILED
redeploy path. A failed pull (e.g. non-existent tag) now immediately
returns an actionable error pointing to update_image_tag instead of
silently continuing and starting the project with stale/missing image.

Also bumps version 0.2.1 → 0.2.2 and adds CHANGELOG entry.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

uv.lock

@@ -362,7 +362,7 @@ wheels = [
 
 [[package]]
 name = "mcp-synology-container"
-version = "0.2.1"
+version = "0.2.2"
 source = { editable = "." }
 dependencies = [
     { name = "click" },