docs: Update CHANGELOG and README for deployment models and troubleshooting

- Added multi-platform deployment architecture details (Web App, PWA, DApp) to README.md.
- Included comprehensive troubleshooting guides and fix scripts in README.md.
- Enhanced CHANGELOG.md with new features, fixes, and improvements, including TypeScript error resolutions and updated documentation structure.
- Revised development setup instructions in DEV_SETUP.md to reflect changes in script usage and environment variable setup.

scripts/check-status.ps1

@@ -27,11 +27,9 @@ try {
 }
 
 # Check PostgreSQL
-$pgRunning = $false
 try {
     $result = Test-NetConnection -ComputerName localhost -Port 5432 -WarningAction SilentlyContinue
     if ($result.TcpTestSucceeded) {
-        $pgRunning = $true
         Write-Host "✅ PostgreSQL (5432): Running" -ForegroundColor Green
     }
 } catch {
@@ -39,11 +37,9 @@ try {
 }
 
 # Check Redis
-$redisRunning = $false
 try {
     $result = Test-NetConnection -ComputerName localhost -Port 6379 -WarningAction SilentlyContinue
     if ($result.TcpTestSucceeded) {
-        $redisRunning = $true
         Write-Host "✅ Redis (6379): Running" -ForegroundColor Green
     }
 } catch {