remove auth ini logic

[xzrderek]

Note

Switch to API-key-only auth with account ID derived via verifyApiKey, removing auth.ini/profile and FIREWORKS_ACCOUNT_ID usage, and updating CLI, docs, examples, and tests accordingly.

• Auth:
  • Simplify to API-key-only auth: get_fireworks_api_key reads env; get_fireworks_account_id derives via verifyApiKey against FIREWORKS_API_BASE.
  • Remove auth.ini/profile resolution logic and all references to FIREWORKS_ACCOUNT_ID as input.
  • Update messages/errors to reflect derived account id.
• CLI:
  • Drop --profile support and related env bootstrapping; keep --server to set FIREWORKS_API_BASE.
  • Update RFT creation and upload flows to resolve account id via API key (_ensure_account_id).
• Docs/Examples:
  • Remove FIREWORKS_ACCOUNT_ID setup and auth.ini guidance across CONTRIBUTING.md, CLI docs, READMEs, and .env.example.
  • Clarify credential source order: only FIREWORKS_API_KEY (optional FIREWORKS_API_BASE).
• Platform API:
  • Logging/messages updated; validation requires API key/base only.
• Tests:
  • Rewrite auth tests to drop ini/profile cases; mock verify_api_key_and_get_account_id where needed.
  • Adjust CLI/evaluation/upload tests to no longer set FIREWORKS_ACCOUNT_ID and to stub account-id derivation.

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