Move root test programs and scripts into proper folders

Author: MPCoreDeveloper

run-join-debug.ps1

@@ -11,7 +11,7 @@
 
   <ItemGroup>
     <Compile Include="SingleFileTest.cs" />
-    <Compile Include="src\SharpCoreDB\Storage\Scdb\ScdbStructures.cs" />
+    <Compile Include="..\..\..\src\SharpCoreDB\Storage\Scdb\ScdbStructures.cs" />
   </ItemGroup>
 
 </Project>

DebugRangeQuery.cs tests/Manual/DebugRangeQuery.csDebugRangeQuery.cs renamed to tests/Manual/DebugRangeQuery.cs

@@ -0,0 +1,3 @@
+$repoRoot = Resolve-Path (Join-Path $PSScriptRoot "..\..")
+Write-Host "Running JOIN validation with debug output..." -ForegroundColor Cyan
+dotnet run --project (Join-Path $repoRoot "tests\SharpCoreDB.DemoJoinsSubQ") 2>&1 | Select-String -Pattern "(JOIN-DEBUG|WHERE-DEBUG|Validating|Returned|FAIL|All rows:)" -Context 0,2

SQL_PARSING_TEST.cs tests/Manual/SQL_PARSING_TEST.csSQL_PARSING_TEST.cs renamed to tests/Manual/SQL_PARSING_TEST.cs

@@ -1,5 +1,9 @@
 #!/usr/bin/env pwsh
 
+$repoRoot = Resolve-Path (Join-Path $PSScriptRoot "..\..")
+$benchmarkDir = Join-Path $repoRoot "tests/SharpCoreDB.Benchmarks"
+$outputDir = Join-Path $repoRoot "BenchmarkResults_Phase2A"
+
 # Phase 2A Optimization Benchmarks Runner
 # Measures actual performance improvements for all Week 3 optimizations
 
@@ -8,9 +12,6 @@ Write-Host "║       PHASE 2A OPTIMIZATION BENCHMARKS - RUNNING           ║"
 Write-Host "╚════════════════════════════════════════════════════════════╝" -ForegroundColor Cyan
 Write-Host ""
 
-$benchmarkDir = "tests/SharpCoreDB.Benchmarks"
-$outputDir = "BenchmarkResults_Phase2A"
-
 # Create output directory
 if (!(Test-Path $outputDir)) {
     New-Item -ItemType Directory -Path $outputDir | Out-Null
@@ -84,4 +85,4 @@ Write-Host ""
 Write-Host "✅ Phase 2A benchmarks complete!" -ForegroundColor Green
 Write-Host ""
 
-cd ../..
+cd $repoRoot