feat[agent](windows): client-configurable event channels with live reload

[yllada]

Summary

Windows event channels were hardcoded. They now live in
windows-event-channels.yml next to the agent executable, and changes apply in
about a second without restarting the service.

Additions only: the system channels stay in config, not in the file, so
deleting or corrupting it degrades to default collection instead of reducing
telemetry.

Changes

File	Change
agent/config/const.go	Default channel list and file path, shared by both architectures
agent/collector/schema/windows_channels.go	Resolve/merge and the documented template. No build tags, so it is platform-independent
agent/collector/platform/windows_amd64.go	Shared callback and registry, lock split, bounded retry, reconcile
agent/collector/platform/windows_arm64.go	Same change, regenerated from amd64
agent/collector/configwatcher/watcher.go	WatchFile takes a path and debounce; Watch wraps it with zero debounce
agent/version.json	11.1.4 → 11.1.5

A second commit updates Go dependencies across all 23 modules, which brings
go_deps back to green.

[github-actions]

🛑 AI review — Engineer review required

This PR touches critical paths or introduces changes the model cannot judge with sufficient confidence. @Kbayero @osmontero please review.

🛑 architecture (gemini-3-flash-lite) — blocking — must fix before merge

Summary: Agent changes include new Windows event channel monitoring and runtime callback registry modifications.

• high agent/collector/platform/windows_amd64.go:133 — Touches agent code and internal execution flows for Windows event subscription management. Any changes to agent logic or event callback mechanisms require careful validation against deployed versions to prevent agent breakage.
• medium installer/go.mod:6 — Touches installer path, which is a critical-path component requiring senior review and a coordinated rollout plan.

✅ bugs (gemini-3-flash-lite) — clean

Summary: Add dynamic Windows event channel config watching and reconciliation with safe callback mapping

No findings.

✅ security (gemini-3-flash-lite) — clean

Summary: Routine dependency version bumps and implementation of dynamic Windows event channel subscription and file-watching configuration reloading.

No findings.

[utmstackprapprover]

Changes requested — AI review found blocking issues (high/critical, or engineer review required). See above.