JudgeConfig missing endpoint field — judge cannot use custom endpoint #14

Bug

ifixai/judge/config.py — JudgeConfig has provider, api_key, model, temperature, max_calls_per_run, timeout, but no endpoint.

When using a custom endpoint (e.g. Anthropic-compatible proxy like MiniMax, or self-hosted vLLM), the judge provider has no way to receive it. JudgeEvaluator in judge/evaluator.py constructs ProviderConfig without endpoint, so the judge always falls back to the provider default.

Impact

Any --provider with a custom --endpoint will have the SUT connect correctly but the judge will use the wrong endpoint. This makes self-judge mode unusable with proxy/non-default endpoints.

Suggested Fix

judge/config.py:

class JudgeConfig(BaseModel):
    provider: str = ""
    model: Optional[str] = None
    api_key: str = ""
    endpoint: Optional[str] = None  # <-- add
    ...

judge/evaluator.py:

self._provider_config = ProviderConfig(
    provider=config.provider,
    api_key=config.api_key,
    model=config.model,
    endpoint=config.endpoint,  # <-- add
    timeout=config.timeout,
)

Reproduction

ifixai run --provider anthropic \
  --endpoint "https://api.minimaxi.com/anthropic" \
  --api-key "$MINIMAX_API_KEY" \
  --model MiniMax-M2.7 \
  --eval-mode self \
  --strategic

• SUT connects to MiniMax ✅
• Structural tests (B01-B04, B25) PASS ✅
• Judge calls go to api.anthropic.com → 401 ❌

Tested on v1.0.0 (clone from main).