fix: point MI50 backend at 10.0.0.42 (avoid terra-mechanics conflict)

CT202's old static 10.0.0.44 collided with the terra-mechanics dev VM (tmi-dev).
Reassigned CT202 to 10.0.0.42 and repointed MI50_BASE_URL accordingly.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

lyra/config.py

@@ -29,7 +29,7 @@ def load() -> Config:
     return Config(
         local_base_url=os.getenv("LOCAL_BASE_URL", "http://localhost:11434"),
         local_model=os.getenv("LOCAL_MODEL", "qwen2.5:7b-instruct"),
-        mi50_base_url=os.getenv("MI50_BASE_URL", "http://10.0.0.44:8080/v1"),
+        mi50_base_url=os.getenv("MI50_BASE_URL", "http://10.0.0.42:8080/v1"),
         mi50_model=os.getenv("MI50_MODEL", "local-gpu"),
         openai_api_key=os.getenv("OPENAI_API_KEY", ""),
         cloud_model=os.getenv("CLOUD_MODEL", "gpt-4o-mini"),