ci: use SAP AI Core model names and remove unavailable models

- Use 'anthropic--claude-4.6-sonnet' instead of 'claude-sonnet-4-6'
  (hai-aicore proxy requires the 'anthropic--' prefix)
- Remove gpt-4.1, gpt-4.1-mini, gpt-5-mini reviewers since those models
  are not deployed in SAP AI Core
- Keep sonnet, gpt-5, and security reviews

.gitea/workflows/ci.yml

@@ -19,6 +19,7 @@ jobs:
       - run: go build -o review-bot ./cmd/review-bot
 
   # Self-review: builds from source since we're pre-release
+  # Models must match SAP AI Core deployments (use 'anthropic--' prefix for Claude)
   review:
     runs-on: ubuntu-24.04
     if: github.event_name == 'pull_request'
@@ -30,27 +31,12 @@ jobs:
             token_secret: SONNET_REVIEW_TOKEN
             provider: anthropic
             llm_path: /anthropic/v1
-            model: claude-sonnet-4-6
+            model: anthropic--claude-4.6-sonnet
           - 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