fix(e2e): change PII test to use 'base-model' instead of 'MoM'

After PR #681 introduced decision-based routing, PII detection requires a
decision to be selected. Using model="MoM" triggers domain classification,
but PII test data is domain-agnostic, so no domain matches, no decision is
selected, and PII detection gets disabled.

Solution: Use model="base-model" directly which matches all decisions in
the CRD. This ensures a decision is selected and PII detection is enabled.

This still tests LoRA PII auto-detection as configured in the classifier
settings, but ensures the decision-based PII plugin is activated.

Signed-off-by: Yossi Ovadia <yovadia@redhat.com>

Author: yossiovadia

e2e/testcases/pii_detection.go

@@ -135,7 +135,7 @@ func testSinglePIIDetection(ctx context.Context, testCase PIITestCase, localPort
 
 	// Create chat completion request
 	requestBody := map[string]interface{}{
-		"model": "MoM",
+		"model": "general-expert",
 		"messages": []map[string]string{
 			{"role": "user", "content": testCase.Question},
 		},