style: run Prettier on all files including new files from main

After merging main (PR #38), running Prettier on:
- All existing files (117 previously formatted)
- New files from PR #38:
  - .env.development, .env.production, .env.staging
  - .github/workflows/ci-cd-pipeline.yml
  - IMPLEMENTATION_SUMMARY.md
  - app/api/* (new API routes)
  - lib/rate-limit.ts, lib/middleware/*
  - __tests__/rate-limiting.test.ts
  - docs/RATE_LIMITING.md
  - jest.config.js, jest.setup.js
  - PR_40_DESCRIPTION.md

Total: ~130 files formatted with consistent style.

All changes are cosmetic (spacing, quotes, semicolons, line endings).
No functional changes.

Author: rishabh3562

IMPLEMENTATION_SUMMARY.md

@@ -3,9 +3,11 @@
 ## What I Did
 
 ### 1. Created Complete CI/CD Automation (`.github/workflows/ci-cd-pipeline.yml`)
+
 **Why:** Issue #29 requested automated deployment pipeline with testing, preview deployments, and production automation.
 
 **What it does:**
+
 - Automatically runs code quality checks (ESLint, TypeScript, Prettier) on every PR
 - Runs security audits to catch vulnerable dependencies
 - Builds and tests the application
@@ -16,102 +18,123 @@
 - Includes health checks and automatic rollback if production deploy fails
 
 **Key benefits:**
+
 - No more manual deployments
 - Catches errors before they reach production
 - Every PR gets a test environment automatically
 
 ### 2. Created Rollback System (`.github/workflows/rollback-deployment.yml`)
+
 **Why:** Issue #29 required "quick rollback capability" for when deployments go wrong.
 
 **What it does:**
+
 - Allows manual rollback to previous version via GitHub Actions UI
 - Can rollback to any specific commit
 - Validates the rollback target before deploying
 - Runs health checks after rollback
 - Creates GitHub issue to track the incident
 
 **Key benefits:**
+
 - Fast recovery from bad deployments (minutes instead of hours)
 - No need for developers to manually revert and redeploy
 
 ### 3. Created Environment Configuration Files
+
 **Files:** `.env.development`, `.env.staging`, `.env.production`
 
 **Why:** Different environments need different settings (databases, APIs, etc.)
 
 **What they contain:**
+
 - Templates for environment variables (API keys, database URLs)
 - NO actual secrets - just placeholders and instructions
 - Documentation comments explaining each variable
 
 **Key benefits:**
+
 - Clear separation between dev/staging/production
 - Prevents accidentally using production database in testing
 
 ### 4. Created Documentation
+
 **Files:** `docs/DEPLOYMENT.md` (700+ lines), `docs/CICD_SETUP.md` (500+ lines)
 
 **Why:** Complex CI/CD systems need clear instructions for setup and usage.
 
 **What they cover:**
+
 - Step-by-step setup guide (Vercel, MongoDB, GitHub Secrets)
 - How to deploy to each environment
 - How to rollback if something breaks
 - Troubleshooting common issues
 - Security best practices
 
 ### 5. Updated `.gitignore`
+
 **Why:** Prevent accidentally committing secrets or generated files.
 
 **Added exclusions:**
+
 - `.deployment/` - Files generated by CI/CD (deployment URLs, commit SHAs)
 - `.env` - Actual environment files with real secrets
 
 ## Are These Files Sensitive?
 
 ### ❌ NOT Sensitive (Safe to Commit)
+
 ✅ `.github/workflows/*.yml` - Workflow definitions (public logic)
 ✅ `.env.development`, `.env.staging`, `.env.production` - **Templates only, no real secrets**
 ✅ `docs/*.md` - Documentation (public information)
 ✅ `.gitignore` - File exclusion rules
 
 **These files contain:**
+
 - Placeholder text like `your_api_key_here`
 - Variables that reference GitHub Secrets: `${{ secrets.VERCEL_TOKEN }}`
 - Public documentation and instructions
 
 ### ⚠️ WILL BE Sensitive (NOT Committed - Protected by .gitignore)
+
 ❌ `.env.local` - Your actual local secrets
 ❌ `.env` - Actual environment variables
 ❌ `.deployment/` - Generated deployment tracking files
 ❌ `.vercel/` - Vercel project configuration
 
 **Why they're excluded:**
+
 - These would contain real API keys, database passwords, tokens
 - The `.gitignore` I updated prevents these from being committed
 
 ## How Secrets Are Protected
 
 ### In the Workflows
+
 Secrets are referenced like this:
+
 ```yaml
 env:
   MONGODB_URI: ${{ secrets.MONGODB_URI_PRODUCTION }}
 ```
 
 This means:
+
 1. The actual secret is stored in GitHub Settings → Secrets (encrypted)
 2. The workflow only references the secret name
 3. GitHub injects the real value at runtime
 4. Secret values never appear in logs or code
 
 ### In Environment Files
+
 The template files (`.env.production`, etc.) contain:
+
 ```bash
 MONGODB_URI=${MONGODB_URI_PRODUCTION}
 ```
 
 This means:
+
 1. The file itself contains no real secrets
 2. It's a template showing what variables are needed
 3. Real secrets come from GitHub Secrets during deployment
@@ -129,6 +152,7 @@ This means:
 ## What Happens Next
 
 ### To Use This (After Merging)
+
 1. **Add GitHub Secrets** - Store real credentials in GitHub Settings
    - VERCEL_TOKEN
    - MONGODB_URI_PRODUCTION
@@ -140,6 +164,7 @@ This means:
 4. **Merge to main** - Automatic production deployment
 
 ### Current State
+
 - ✅ Branch created: `fix/issue-29`
 - ✅ Changes committed locally
 - ✅ Pushed to remote