ci: remove unavailable models from review matrix

Models claude-sonnet-4-6, gpt-4.1, gpt-4.1-mini, and gpt-5-mini are not
deployed on the LLM proxy, causing 502 errors. Keep only gpt-5 which
is the only available model.

.gitea/workflows/ci.yml

@@ -19,6 +19,8 @@ jobs:
       - run: go build -o review-bot ./cmd/review-bot
 
   # Self-review: builds from source since we're pre-release
+  # Note: claude-sonnet-4-6, gpt-4.1, gpt-4.1-mini, gpt-5-mini removed —
+  #       not deployed on LLM proxy. Only gpt-5 is available.
   review:
     runs-on: ubuntu-24.04
     if: github.event_name == 'pull_request'
@@ -26,31 +28,11 @@ jobs:
     strategy:
       matrix:
         include:
-          - name: sonnet
-            token_secret: SONNET_REVIEW_TOKEN
-            provider: anthropic
-            llm_path: /anthropic/v1
-            model: claude-sonnet-4-6
           - 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