chore: improve DX scripts, fix test suite, and harden tooling

Scripts:
- remote.sh: remove unused open_browser() function
- deploy-remote.sh: add DB backup before deploy, --skip-backup flag, step numbering
- db-backup.sh: fix macOS compat (xargs -r is GNU-only), use portable approach
- db-restore.sh: add safety backup before restore, SQL file validation, file size display
- logs.sh: default to no-follow with --tail=100, order-independent arg parsing
- docker-cleanup.sh: add Docker health check, colored output
- test-sequential.sh: exclude *.integration.test.ts by default, add --integration flag
- simulate-ci.sh: pass --integration flag (has real DB)

Tests:
- db.test.ts: fix mock path from ./DrizzleClient to @shared/db/DrizzleClient
- server.settings.test.ts: rewrite mocks for gameSettingsService (old config/saveConfig removed)
- server.test.ts: add missing config.lootdrop and BotClient mocks, complete DrizzleClient chain
- indexes.test.ts: rename to indexes.integration.test.ts (requires live DB)

Config:
- package.json: test script uses sequential runner, add test:ci and db:restore aliases
- deploy.yml: use --integration flag in CI (has Postgres service)

shared/scripts/remote.sh

@@ -1,5 +1,14 @@
 #!/bin/bash
 
+# =============================================================================
+# Aurora Remote Tunnel Script
+# =============================================================================
+# Establishes secure SSH tunnels to remote Aurora services.
+# Uses autossh for automatic reconnection if available.
+#
+# Usage: ./remote.sh
+# =============================================================================
+
 # Load environment variables
 if [ -f .env ]; then
   set -a
@@ -26,21 +35,6 @@ echo ""
 echo "Press Ctrl+C to stop all connections."
 echo ""
 
-# Function to open browser (cross-platform)
-open_browser() {
-  sleep 2  # Wait for tunnel to establish
-  if command -v open &> /dev/null; then
-    # macOS
-    open "http://localhost:$DASHBOARD_PORT"
-  elif command -v xdg-open &> /dev/null; then
-    # Linux
-    xdg-open "http://localhost:$DASHBOARD_PORT"
-  elif command -v start &> /dev/null; then
-    # Windows (Git Bash)
-    start "http://localhost:$DASHBOARD_PORT"
-  fi
-}
-
 # Check if autossh is available for auto-reconnection
 if command -v autossh &> /dev/null; then
   echo "✅ Using autossh for automatic reconnection"