[Fix] [CI/Server]: build ats-engine in workflows and configure database url for lint

[Gautam25Raj]

Description

During CI runs on clean environments, three workflow failures occurred:

1. @veriworkly/server failed TypeScript compilation and Vitest suites because @veriworkly/ats-engine was not compiled in the Build Shared Packages step (only @veriworkly/profile-core was listed).
2. The apps/server prebuild script only executed Prisma generation without compiling its workspace dependencies, which caused compilation to fail when dist was absent.
3. The Lint & Format workflow failed during npm ci because Prisma 7 requires DATABASE_URL during postinstall (npm run db:generate).

This PR addresses all three issues:

• Adds @veriworkly/ats-engine to the Build Shared Packages step in both .github/workflows/builds.yaml and .github/workflows/tests.yaml.
• Updates apps/server/package.json to compile @veriworkly/profile-core and @veriworkly/ats-engine during prebuild.
• Adds DATABASE_URL: "postgresql://dummy:dummy@localhost:5432/dummy" to .github/workflows/lint-format.yaml so npm ci finishes without errors.

Linked Issue

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update
• 🧪 Tests (adding or updating tests)

Checklist

• I have read the CONTRIBUTING.md document.
• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• New and existing unit tests pass locally with my changes.
• Any dependent changes have been merged and published in downstream modules.