SwarmVault 3.16.1

• Fixed provider remove corrupting swarmvault.config.json when the last configured provider was removed: required task assignments were deleted, leaving a config the CLI could no longer parse. Removal is now refused with a clear error while required tasks still point at the provider.
• Fixed provider remove --fallback accepting unconfigured provider ids, which silently reassigned tasks to a provider that did not exist.
• Improved provider remove reporting: output now distinguishes tasks reassigned to the fallback provider from optional task assignments that were cleared, and the JSON result includes fallbackProviderId, reassignedTasks, and clearedTasks alongside the existing updatedTasks.
• Stopped provider remove from rewriting the config file when nothing was removed and no task assignments changed.
• Refreshed transitive dependencies to pick up published security patches (fast-uri, @xmldom/xmldom, hono, @hono/node-server, fast-xml-builder, ws, qs), clearing all patchable audit advisories.
• Updated site provider docs for the stricter provider remove semantics.
• Bumped OSS packages, viewer, Obsidian plugin metadata, MCP-facing version, ClawHub skill metadata, and desktop package metadata to 3.16.1.