internal: Load environment variables in regen_weekly.sh

Update the weekly model score regeneration script to source environment
variables from ./.env if the file exists. This ensures that necessary
API keys and configurations are available when running the script.

Author: maruel

internal/regen_weekly.sh

@@ -10,6 +10,13 @@ set -euo pipefail
 cd "$(dirname "$0")"
 cd ..
 
+if [[ -f "./.env" ]]; then
+	set -a
+	# shellcheck disable=SC1091
+	source "./.env"
+	set +a
+fi
+
 go install ./cmd/list-models ./cmd/scoreboard
 # Providers that can't run in CI: local servers, or CLI wrappers.
 EXCLUDE="bfl claudecode codex llamacpp ollama openaicompatible opencode openaibase openaichat openairesponses perplexity pi"