Fix go.mod: downgrade incident-recorder and integrity-monitor to go 1.23

Both modules had go 1.25.3 (a non-existent Go version) in go.mod,
which breaks when CI enforces GOTOOLCHAIN=local with Go 1.23.
Align with all other services at go 1.23.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: SecAI-Hub

services/incident-recorder/go.mod

@@ -1,5 +1,5 @@
 module github.com/SecAI-Hub/incident-recorder
 
-go 1.25.3
+go 1.23
 
 require gopkg.in/yaml.v3 v3.0.1

services/integrity-monitor/go.mod

@@ -1,5 +1,5 @@
 module github.com/SecAI-Hub/integrity-monitor
 
-go 1.25.3
+go 1.23
 
 require gopkg.in/yaml.v3 v3.0.1