fix(rx): reject undersized typed frames safely

tests/run_host_tests.ps1

@@ -0,0 +1,38 @@
+$ErrorActionPreference = 'Stop'
+
+$repo = Split-Path -Parent $PSScriptRoot
+$build = Join-Path $PSScriptRoot '.build'
+New-Item -ItemType Directory -Force -Path $build | Out-Null
+
+$compiler = if (Test-Path -LiteralPath 'C:\MinGW\bin\g++.exe') {
+    'C:\MinGW\bin\g++.exe'
+} else {
+    (Get-Command g++ -ErrorAction Stop).Source
+}
+
+$common = @(
+    '-std=c++17', '-Wall', '-Wextra', '-Werror',
+    '-Wno-unused-parameter', '-Wno-ignored-qualifiers', '-Wno-sign-compare',
+    '-I', (Join-Path $PSScriptRoot 'arduino_stubs'),
+    '-I', $repo
+)
+
+& $compiler @common `
+    (Join-Path $PSScriptRoot 'test_timing_contract.cpp') `
+    (Join-Path $repo 'IR_Encoder.cpp') `
+    (Join-Path $repo 'IR_config.cpp') `
+    '-o' (Join-Path $build 'test_timing_contract.exe')
+if ($LASTEXITCODE -ne 0) { throw 'timing test build failed' }
+
+& (Join-Path $build 'test_timing_contract.exe')
+if ($LASTEXITCODE -ne 0) { throw 'timing test failed' }
+
+& $compiler @common `
+    (Join-Path $PSScriptRoot 'test_packet_types.cpp') `
+    (Join-Path $repo 'PacketTypes.cpp') `
+    (Join-Path $repo 'IR_config.cpp') `
+    '-o' (Join-Path $build 'test_packet_types.exe')
+if ($LASTEXITCODE -ne 0) { throw 'packet test build failed' }
+
+& (Join-Path $build 'test_packet_types.exe')
+if ($LASTEXITCODE -ne 0) { throw 'packet test failed' }