Launch managed network proxies on remote executors#33906
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## Why Remote executions need managed-network proxy listeners in the executor so their loopback proxy addresses are reachable by the launched process. ## What changed - Add a capability-gated exec-server protocol field for executor-local proxy launch configuration, including network policy, audit metadata, and execution attribution. - Start the proxy while preparing a remote process, replace inherited proxy environment variables with its local addresses, and derive the sandbox context from its listeners. - Keep the proxy alive until inherited output streams close, then shut it down. - Reject unsupported remote settings such as MITM and credential injection. ## Testing - Cover configuration round trips and rejection of unsupported settings. - Verify executor-local startup, blocked-domain enforcement, protocol compatibility, and proxy lifetime through process closure. GitOrigin-RevId: c984f54e3e600aa9ebcbf8cf4574046e2c199d11
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Launch managed network proxies on remote executors
Why
Remote executions need managed-network proxy listeners in the executor so their
loopback proxy addresses are reachable by the launched process.
What changed
launch configuration, including network policy, audit metadata, and execution
attribution.
environment variables with its local addresses, and derive the sandbox
context from its listeners.
Testing
compatibility, and proxy lifetime through process closure.