🛡️ Sentinel: [HIGH] Fix SSRF vulnerability in CLI executor

[rschumann]

🚨 Severity: HIGH
💡 Vulnerability: Server-Side Request Forgery (SSRF) vulnerability in executeRemote within cli_executor.go (flagged as G704 by gosec). The target URL was constructed using string manipulation, leaving the user-provided remoteHost potentially tainted.
🎯 Impact: An attacker could craft a malicious remoteHost URL that, while bypassing initial scheme/host checks, could result in the internal HTTP client making requests to unintended internal network endpoints, bypassing network segmentation.
🔧 Fix: Refactored the URL construction to use a strict url.URL{...} struct literal. This explicitly rebuilds the URL using only the validated components (Scheme, Host, Path, User, RawQuery) from the parsed input, sanitizing the input and resolving the taint analysis finding.
✅ Verification: Verified via gosec ./... that the G704 vulnerability is no longer reported for this file, and ran go test ./... -short to ensure no functional regressions.

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PR created automatically by Jules for task 11550221022199688949 started by @rschumann

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