ci: remove unavailable models from review matrix

Only gpt-5 is currently deployed on SAP AI Core. Remove models that
fail with 'no deployment found' errors:
- claude-sonnet-4-6
- gpt-4.1
- gpt-4.1-mini
- gpt-5-mini

This can be reverted once the models are deployed.

.gitea/workflows/ci.yml

@@ -26,31 +26,14 @@ jobs:
     strategy:
       matrix:
         include:
-          - name: sonnet
-            token_secret: SONNET_REVIEW_TOKEN
-            provider: anthropic
-            llm_path: /anthropic/v1
-            model: claude-sonnet-4-6
+          # Only gpt-5 is deployed on SAP AI Core currently
+          # Other models (gpt-4.1, gpt-4.1-mini, gpt-5-mini, claude-sonnet-4-6)
+          # fail with "no deployment found" errors
           - name: gpt
             token_secret: GPT_REVIEW_TOKEN
             provider: openai
             llm_path: /openai/v1
             model: gpt-5
-          - name: gpt41
-            token_secret: GPT_REVIEW_TOKEN
-            provider: openai
-            llm_path: /openai/v1
-            model: gpt-4.1
-          - name: gpt5-mini
-            token_secret: GPT_REVIEW_TOKEN
-            provider: openai
-            llm_path: /openai/v1
-            model: gpt-5-mini
-          - name: gpt41-mini
-            token_secret: GPT_REVIEW_TOKEN
-            provider: openai
-            llm_path: /openai/v1
-            model: gpt-4.1-mini
           - name: security
             token_secret: SECURITY_REVIEW_TOKEN
             provider: openai