ci: fix MSSQL service health check

Remove the sqlcmd health check since it's not available in the MSSQL
Docker image. Instead, add a wait step that checks for port availability
and gives the service time to fully initialize.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: claude

.github/workflows/ci.yml

@@ -51,12 +51,6 @@ jobs:
           MSSQL_PID: Developer
         ports:
           - 1433:1433
-        options: >-
-          --health-cmd "/opt/mssql-tools18/bin/sqlcmd -S localhost -U sa -P 'MySecretPassword1!' -Q 'SELECT 1' -C || exit 1"
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 10
-          --health-start-period 30s
     steps:
     - uses: actions/checkout@v6
     - uses: actions/setup-go@v6
@@ -83,6 +77,19 @@ jobs:
       env:
         CGO_ENABLED: "0"
 
+    - name: Wait for databases to be ready
+      run: |
+        echo "Waiting for MSSQL..."
+        for i in {1..60}; do
+          if nc -z localhost 1433 2>/dev/null; then
+            echo "MSSQL port is open, waiting for service to be ready..."
+            sleep 10
+            break
+          fi
+          echo "Waiting for MSSQL... ($i/60)"
+          sleep 2
+        done
+
     - name: test ./...
       run: gotestsum --junitfile junit.xml -- --tags=examples -timeout 20m ./...
       if: ${{ matrix.os }} != "windows-2022"