Add Victoria metrics SLO validator plugin

Signed-off-by: Xabier Larrakoetxea <me@slok.dev>

Author: slok

.github/CODEOWNERS

@@ -5,4 +5,5 @@
 /internal/plugin/slo/contrib/    @slok
 
 # Specific contrib SLO owners.
-/internal/plugin/slo/contrib/info_labels_v1/    @cxdy @slok @wbollock
+/internal/plugin/slo/contrib/info_labels_v1/                @cxdy @slok @wbollock
+/internal/plugin/slo/contrib/validate_victoria_metrics_v1/  @slok

CHANGELOG.md

@@ -5,7 +5,9 @@
 ### Added
 
 - Add contrib plugin directory and CODEOWNERS policies.
-- Contrib plugin: `info_labels_v1`.
+- Contrib plugin: `/internal/plugin/slo/contrib/info_labels_v1/`.
+- Allow `github.com/VictoriaMetrics/metricsql` module in SLO plugins.
+- Contrib plugin: `sloth.dev/contrib/validate_victoria_metrics/v1`.
 
 ## [v0.13.0] - 2025-09-10