fix(api): correct error log message in RemoveSandbox

[jakubno]

The log said "Error pausing sandbox" in the generic removeSandboxFromNode failure path, which covers pause, kill, and snapshot. Make it accurate.

[cursor]

PR Summary

Low Risk
Low risk change limited to logging text/fields in the sandbox removal failure path; no behavior, data flow, or security logic is modified.

Overview
Updates RemoveSandbox to log Error removing sandbox (instead of Error pausing sandbox) when removeSandboxFromNode fails, and includes the state_action field to better identify which removal transition (pause/kill/etc.) triggered the error.

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[claude]

LGTM — single log string fix, no behavior change.

Extended reasoning...

Overview

Single-line change in packages/api/internal/orchestrator/delete_instance.go: corrects the error log message in the RemoveSandbox generic failure path from "Error pausing sandbox" to "Error removing sandbox". This path is reached after removeSandboxFromNode returns an error, which can be triggered by pause, kill, or snapshot actions — so the old message was misleading.

Security risks

None. No logic, auth, data handling, or external interface is modified.

Level of scrutiny

Minimal scrutiny required. This is a one-line log string correction with zero behavioral impact.

Other factors

No bugs reported. No open reviewer comments. Change is mechanical and obviously correct.