fix: return remote exec errors for unsupported types

[rvql]

This PR is for:

• Agent

[rvql]

@claude review this code

[claude]

Claude finished @rvql's task in 5m 50s —— View job

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Review complete

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Result

I did not find any blocking issues in this PR.

The main behavior change in @agent/src/rpc/remote_exec.rs:894-931 looks correct: unsupported exec_type values now return an explicit RemoteExecResponse with errmsg instead of being silently ignored. That also correctly covers the non-enterprise case where DRY_REPLAY_PCAP is defined in the proto but not handled by this build.

The added tests at @agent/src/rpc/remote_exec.rs:1455-1499 are a good regression check for both cases:

• unknown raw enum values (99)
• known-but-unsupported enum variants (DryReplayPcap without the enterprise feature)

Notes

This was a static review. I wasn't able to run git diff origin/main...HEAD or Rust tests in this run because shell access was not available.