feat: add system health diagnostics

backend/app/config.py

@@ -5,6 +5,8 @@ class Settings(BaseSettings):
     app_name: str = "MinerOps Console"
     app_env: str = "development"
     app_timezone: str = "America/Winnipeg"
+    minerops_build_commit: str | None = None
+    minerops_build_version: str | None = None
 
     postgres_db: str = "minerops"
     postgres_user: str = "minerops"