update upload

[xzrderek]

Note

Adds --env-file to upload and auto-uploads all API_KEY variables from .env/environment as Fireworks secrets (not just FIREWORKS_API_KEY).

• CLI (upload):
  • Add --env-file option to specify a .env file for secrets.
• Secret management:
  • New loader _load_secrets_from_env_file parses .env and filters keys containing API_KEY.
  • Includes FIREWORKS_API_KEY from environment and resolves FIREWORKS_ACCOUNT_ID if needed.
  • Iteratively creates/updates each discovered secret via create_or_update_fireworks_secret, with concise status/warnings.

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