test: add integration tests for all feasible language runtimes in CI (#7849)

* test: add integration tests for all feasible language runtimes in CI

Add integration tests and CI setup for languages that were previously
untested. Each test runs a simple "hello world" job through the full
worker pipeline to verify end-to-end execution.

New language tests added to worker.rs:
- Nativets (4 tests): basic string, numeric args, object return, datetime
- Bunnative: TypeScript execution via Bun native runtime
- CSharp: .NET compilation and execution (feature-gated)
- PHP: PHP script execution (feature-gated)
- Ruby: Ruby script execution (feature-gated)
- MySQL: SQL query via async MySQL client (feature-gated)
- PowerShell: pwsh script execution
- PostgreSQL: SQL query against test database

CI changes (backend-test.yml):
- Add MySQL 8.0 service container
- Add setup-php (8.3 + composer), setup-ruby (3.3), pwsh install
- Enable feature flags: csharp, php, ruby, mysql
- Pass language binary paths: PHP_PATH, COMPOSER_PATH, RUBY_PATH,
  BUNDLE_PATH, GEM_PATH, POWERSHELL_PATH, DOTNET_PATH
- Uncomment and modernize CSharp test (was commented out)
- Increase test timeout 16m -> 20m for additional runtimes

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

* sqlx

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/backend-test.yml

@@ -31,6 +31,16 @@ jobs:
         options: >-
           --health-cmd pg_isready --health-interval 10s --health-timeout 5s
           --health-retries 5
+      mysql:
+        image: mysql:8.0
+        ports:
+          - 3306:3306
+        env:
+          MYSQL_ROOT_PASSWORD: changeme
+          MYSQL_DATABASE: windmill_test
+        options: >-
+          --health-cmd "mysqladmin ping -h localhost" --health-interval 10s
+          --health-timeout 5s --health-retries 5
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-dotnet@v4
@@ -51,6 +61,18 @@ jobs:
       - uses: astral-sh/setup-uv@v6.2.1
         with:
           version: "0.9.24"
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.3'
+          tools: composer
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.3'
+          bundler-cache: false
+      - name: Install PowerShell
+        run: |
+          sudo apt-get update && sudo apt-get install -y powershell
+        working-directory: /
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           cache-workspaces: backend
@@ -183,7 +205,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-duckdb-ffi-
       - name: cargo test
-        timeout-minutes: 16
+        timeout-minutes: 20
         env:
           SQLX_OFFLINE: true
           DATABASE_URL: postgres://postgres:changeme@localhost:5432/windmill
@@ -196,6 +218,6 @@ jobs:
           WMDEBUG_FORCE_NO_LEGACY_DEBOUNCING_COMPAT: 1
           TEST_NPM_REGISTRY: "http://localhost:4873/:_authToken=${{ env.NPM_TOKEN }}"
         run: |
-          deno --version && bun -v && node --version && go version && python3 --version
+          deno --version && bun -v && node --version && go version && python3 --version && php --version && ruby --version && pwsh --version && dotnet --version
           cd windmill-duckdb-ffi-internal && ./build_dev.sh && cd ..
-          DENO_PATH=$(which deno) BUN_PATH=$(which bun) NODE_BIN_PATH=$(which node) GO_PATH=$(which go) UV_PATH=$(which uv) cargo test --features enterprise,deno_core,duckdb,license,python,rust,scoped_cache,parquet,private,private_registry_test --all -- --nocapture
+          DENO_PATH=$(which deno) BUN_PATH=$(which bun) NODE_BIN_PATH=$(which node) GO_PATH=$(which go) UV_PATH=$(which uv) PHP_PATH=$(which php) COMPOSER_PATH=$(which composer) RUBY_PATH=$(which ruby) BUNDLE_PATH=$(which bundle) GEM_PATH=$(which gem) POWERSHELL_PATH=$(which pwsh) DOTNET_PATH=$(which dotnet) cargo test --features enterprise,deno_core,duckdb,license,python,rust,scoped_cache,parquet,private,private_registry_test,csharp,php,ruby,mysql --all -- --nocapture