fix(convex): mover cron jobs para API HTTP + crontab do Linux

Problema:
- Cron jobs do Convex criam registros em _scheduled_job_logs
- Convex self-hosted carrega TODAS as versoes em memoria
- 1488 execucoes/dia = ~45k registros/mes acumulando
- Uso de memoria chegando a 19GB, causando 12 OOM kills/dia

Solucao:
- Criar endpoints HTTP em /api/cron/* para substituir crons
- Desabilitar crons no Convex (comentados em crons.ts)
- Chamar endpoints via crontab do Linux

Novos arquivos:
- src/app/api/cron/chat-cleanup/route.ts
- src/app/api/cron/usb-cleanup/route.ts
- scripts-static/* (copiado da VPS para versionamento)

Documentacao:
- docs/OPERATIONS.md secao 12 com instrucoes do crontab

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

scripts-static/bootstrap.ps1

@@ -0,0 +1,37 @@
+#! powershell
+param(
+    [string]$BaseUrl = "https://scripts.rever.com.br",
+    [string]$WorkDir = "$env:TEMP\\rever-menu",
+    [string]$Profile = "default",
+    [switch]$DryRun
+)
+
+Set-StrictMode -Version Latest
+[Console]::OutputEncoding = [System.Text.Encoding]::UTF8
+[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 -bor [Net.SecurityProtocolType]::Tls11
+
+function Download-File {
+    param([string]$Uri, [string]$Destination)
+    Write-Host ("Baixando {0} -> {1}" -f $Uri, $Destination) -ForegroundColor Cyan
+    Invoke-WebRequest -Uri $Uri -OutFile $Destination -UseBasicParsing
+}
+
+New-Item -ItemType Directory -Path $WorkDir -Force | Out-Null
+
+$menuPath     = Join-Path $WorkDir "menu.ps1"
+$catalogPath  = Join-Path $WorkDir "comandos.json"
+
+Download-File -Uri ("{0}/menu.ps1" -f $BaseUrl) -Destination $menuPath
+Download-File -Uri ("{0}/comandos.json" -f $BaseUrl) -Destination $catalogPath
+
+try { Set-ExecutionPolicy -Scope Process -ExecutionPolicy Bypass -Force -ErrorAction Stop } catch { }
+
+if (-not (Test-Path $menuPath)) {
+    Write-Host "menu.ps1 nao encontrado apos download." -ForegroundColor Red
+    exit 1
+}
+
+$menuArgs = @("-Profile", $Profile)
+if ($DryRun) { $menuArgs += "-DryRun" }
+
+& $menuPath @menuArgs