fix(agent99): scope SigNoz SCP process receipt

scripts/ops/tests/test_agent99_signoz_metadata_executor_runtime_entrypoint.py

@@ -168,6 +168,23 @@ def test_entrypoint_uses_typed_stdout_without_windows_process_exit_code() -> Non
     assert "taskkill.exe /PID $process.Id /T /F" in transport
 
 
+def test_toolchain_scp_uses_scoped_bounded_process_exit_readback() -> None:
+    source = ENTRYPOINT.read_text(encoding="utf-8")
+    transport = source[
+        source.index("function Invoke-Agent99SignozToolchainScp") : source.index(
+            "function New-Agent99SignozLockedRemoteCommand"
+        )
+    ]
+
+    assert '$scpProcess = Start-Process -FilePath "scp.exe"' in transport
+    assert "$scpProcess.WaitForExit(180000)" in transport
+    assert "taskkill.exe /PID $scpProcess.Id /T /F" in transport
+    assert "$scpProcess.WaitForExit()" in transport
+    assert "$scpProcess.Refresh()" in transport
+    assert "$scpProcess.HasExited -and [int]$scpProcess.ExitCode -eq 0" in transport
+    assert "$process.ExitCode" not in source
+
+
 def test_entrypoint_preflight_has_explicit_credential_and_artifact_state_contracts() -> (
     None
 ):