ci: remove GPT models not deployed on AI Core

gpt-4.1, gpt-4.1-mini, and gpt-5-mini are not deployed on SAP AI Core.
Only gpt-5 and anthropic--claude-4.6-sonnet are available.

Removed matrix entries for non-existent deployments to fix CI failures.

.gitea/workflows/ci.yml

@@ -20,6 +20,8 @@ jobs:
 
   # Self-review using native SAP AI Core provider
   # Models must match SAP AI Core deployments
+  # Available models: gpt-5, anthropic--claude-4.6-sonnet, anthropic--claude-4.6-opus
+  # Removed gpt-4.1, gpt-5-mini, gpt-4.1-mini - not deployed on AI Core
   review:
     runs-on: ubuntu-24.04
     if: github.event_name == 'pull_request'
@@ -33,15 +35,6 @@ jobs:
           - name: gpt
             token_secret: GPT_REVIEW_TOKEN
             model: gpt-5
-          - name: gpt41
-            token_secret: GPT_REVIEW_TOKEN
-            model: gpt-4.1
-          - name: gpt5-mini
-            token_secret: GPT_REVIEW_TOKEN
-            model: gpt-5-mini
-          - name: gpt41-mini
-            token_secret: GPT_REVIEW_TOKEN
-            model: gpt-4.1-mini
           - name: security
             token_secret: SECURITY_REVIEW_TOKEN
             model: gpt-5