Rename /deploy to /tensors:deploy and rewrite in Ruby

Move deploy command to tensors namespace and replace bash script with
Ruby for better error handling. Adds API health check after restart.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/deploy.rb

@@ -0,0 +1,84 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# Deploy tensors to junkpile
+# Usage: ruby scripts/deploy.rb
+
+require "open3"
+
+REMOTE = "chi@junkpile"
+REMOTE_DIR = "/opt/tensors/app"
+LOCAL_DIR = File.expand_path("..", __dir__)
+
+def run(cmd, desc: nil)
+  puts "==> #{desc}" if desc
+  puts "    $ #{cmd}" if ENV["DEBUG"]
+
+  stdout, stderr, status = Open3.capture3(cmd)
+
+  unless status.success?
+    puts "ERROR: #{stderr}" unless stderr.empty?
+    puts stdout unless stdout.empty?
+    exit 1
+  end
+
+  stdout
+end
+
+def ssh(cmd)
+  run(%(ssh #{REMOTE} "#{cmd}"))
+end
+
+puts "==> Syncing Python code to junkpile..."
+run(<<~CMD.gsub("\n", " ").strip)
+  rsync -av --delete
+  --exclude='.git'
+  --exclude='__pycache__'
+  --exclude='.venv'
+  --exclude='node_modules'
+  --exclude='.ruff_cache'
+  --exclude='.mypy_cache'
+  --exclude='.pytest_cache'
+  --exclude='*.egg-info'
+  --rsync-path="sudo rsync"
+  #{LOCAL_DIR}/tensors/ #{REMOTE}:#{REMOTE_DIR}/tensors/
+CMD
+
+puts ""
+puts "==> Fixing permissions..."
+ssh("sudo chown -R tensors:tensors #{REMOTE_DIR} && sudo chmod -R g+w #{REMOTE_DIR}")
+
+puts ""
+puts "==> Restarting tensors service..."
+ssh("sudo systemctl restart tensors")
+
+puts ""
+puts "==> Waiting for tensors to start..."
+sleep 2
+
+puts ""
+puts "==> Verifying tensors service..."
+status = ssh("systemctl is-active tensors").strip
+
+if status == "active"
+  puts "✓ tensors service running"
+else
+  puts "✗ tensors service not running (status: #{status})"
+  puts ssh("journalctl -u tensors -n 10 --no-pager")
+  exit 1
+end
+
+puts ""
+puts "==> Checking API health..."
+response = ssh("curl -sf http://127.0.0.1:51200/status || echo 'FAILED'").strip
+
+if response.include?("FAILED")
+  puts "✗ API health check failed"
+  exit 1
+else
+  puts "✓ API responding"
+end
+
+puts ""
+puts "==> Deploy complete!"
+puts "    API: https://tensors-api.saiden.dev"