ci: remove services, use Docker test pattern

Remove GitHub Actions services and let the tests start databases
via the sqltest/docker package, matching the existing pattern for
PostgreSQL and MySQL.

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

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

Author: claude

.github/workflows/ci.yml

@@ -24,33 +24,6 @@ jobs:
         GOARCH: ${{ matrix.goarch }}
   test:
     runs-on: ubuntu-24.04
-    services:
-      postgres:
-        image: postgres:16
-        env:
-          POSTGRES_USER: postgres
-          POSTGRES_PASSWORD: mysecretpassword
-          POSTGRES_DB: postgres
-        ports:
-          - 5432:5432
-        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
-      mysql:
-        image: mysql:9
-        env:
-          MYSQL_DATABASE: dinotest
-          MYSQL_ROOT_PASSWORD: mysecretpassword
-          MYSQL_ROOT_HOST: '%'
-        ports:
-          - 3306:3306
-        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=5
-      mssql:
-        image: mcr.microsoft.com/mssql/server:2022-latest
-        env:
-          ACCEPT_EULA: Y
-          MSSQL_SA_PASSWORD: MySecretPassword1!
-          MSSQL_PID: Developer
-        ports:
-          - 1433:1433
     steps:
     - uses: actions/checkout@v6
     - uses: actions/setup-go@v6
@@ -85,9 +58,6 @@ jobs:
         CI_SQLC_AUTH_TOKEN: ${{ secrets.CI_SQLC_AUTH_TOKEN }}
         SQLC_AUTH_TOKEN: ${{ secrets.CI_SQLC_AUTH_TOKEN }}
         CGO_ENABLED: "0"
-        POSTGRESQL_SERVER_URI: "postgres://postgres:mysecretpassword@localhost:5432/postgres?sslmode=disable"
-        MYSQL_SERVER_URI: "root:mysecretpassword@tcp(localhost:3306)/dinotest?parseTime=true"
-        MSSQL_SERVER_URI: "sqlserver://sa:MySecretPassword1!@localhost:1433?database=master"
 
   vuln_check:
     runs-on: ubuntu-24.04