Refactor load testing scripts to support Bash and PowerShell

- Updated README.md to reflect changes in load testing commands and added usage examples for Bash scripts.
- Converted PowerShell load testing scripts to Bash equivalents for better cross-platform compatibility.
- Added new Bash scripts: run-loadtests.sh, summarize-artillery.sh, and summarize-k6.sh to mirror existing PowerShell functionality.
- Updated admin-api.js and ws-chat.yml for consistency and improved performance metrics reporting.
- Enhanced error handling and output formatting in summary scripts for better readability.

.gitignore

@@ -1,95 +1,95 @@
-# =============================================
-# Linear Void .gitignore
-# =============================================
-
-# Environment & Secrets
-.env
-.env.local
-.env.*.local
-
-# Test coverage
-coverage
-coverage.out
-
-# Logs
-logs
-*.log
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-pnpm-debug.log*
-
-# Benchmark artifacts
-artifacts/
-scripts/loadtest/artifacts/
-
-# Runtime data
-pids
-*.pid
-*.seed
-*.pid.lock
-
-# Dependency directories
-node_modules/
-jspm_packages/
-
-# Build outputs
-dist/
-build/
-out/
-*.min.js
-
-# Go build artifacts
-*.exe
-*.exe~
-*.dll
-*.so
-*.dylib
-
-# FFmpeg temporary files
-*.ts.tmp
-*.m3u8.tmp
-*.m4s.tmp
-hls/
-temp/
-
-# Database & local data
-*.db
-data/
-*.sqlite
-*.sqlite3
-
-# Demo data (tracked in backend/playout/demodata/ for out-of-the-box playout)
-!backend/playout/demodata/
-
-# Docker
-.dockerignore
-**/.dockerignore
-
-# Editor & IDE
-.vscode/
-.idea/
-*.swp
-*.swo
-*~
-
-# OS generated files
-.DS_Store
-.DS_Store?
-._*
-.Spotlight-V100
-.Trashes
-ehthumbs.db
-Thumbs.db
-
-# Terraform / IaC state
-*.tfstate
-*.tfstate.backup
-.terraform/
-
-
-# Temporary architecture artifacts
-**/*.tmp
-**/*.bak
-
+# =============================================
+# Linear Void .gitignore
+# =============================================
+
+# Environment & Secrets
+.env
+.env.local
+.env.*.local
+
+# Test coverage
+coverage
+coverage.out
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+
+# Benchmark artifacts
+artifacts/
+scripts/loadtest/artifacts/
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Build outputs
+dist/
+build/
+out/
+*.min.js
+
+# Go build artifacts
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# FFmpeg temporary files
+*.ts.tmp
+*.m3u8.tmp
+*.m4s.tmp
+hls/
+temp/
+
+# Database & local data
+*.db
+data/
+*.sqlite
+*.sqlite3
+
+# Demo data (tracked in backend/playout/demodata/ for out-of-the-box playout)
+!backend/playout/demodata/
+
+# Docker
+.dockerignore
+**/.dockerignore
+
+# Editor & IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Terraform / IaC state
+*.tfstate
+*.tfstate.backup
+.terraform/
+
+
+# Temporary architecture artifacts
+**/*.tmp
+**/*.bak
+
 # Note: .github/instructions/ is partially ignored but AGENTS.md and core docs are committed