Add doc comment and file-header standards to copilot instructions

[Samrudh9]

Description

Related Issue

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 📚 Documentation update
• 🧪 Test update
• 🔧 Refactor (no functional changes)

Changes Made

Testing

Data Layer Changes

• Ran npm run test:unit - all tests pass
• Added/updated Vitest tests for data-layer changes
• Generated a migration (npm run db:generate) for any schema change

Frontend Changes

• Ran npm run test:e2e - all tests pass
• Added data-testid attributes to interactive elements
• Verified build succeeds (npm run build)

Checklist

• My code follows the project's coding standards
• I have used explicit TypeScript types for function parameters and return values
• I have built the UI with Astro components and Tailwind CSS utility classes (dark theme)
• I have updated documentation (README, instruction files) if needed
• My changes are focused on a single concern
• I have written clear commit messages explaining what and why

Additional Notes

[coderabbitai]

Important

• 🔍 Trigger review

This repository does not receive automatic reviews because it has fewer than 10 stars.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 7a3cbb76-9d2f-4595-ac6e-4711c89a3f49

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