v0.8.1

What's Changed

• Updated DeepSeek support for the current V4 API shape:
  • default CLI model is now deepseek-v4-flash
  • DeepSeek uses https://api.deepseek.com
  • DeepSeek requests use max_tokens, thinking, and reasoning_effort
  • DeepSeek cache hit/miss usage fields are parsed when present
• Added Model Presets documentation covering first-class provider constructors and DeepSeek legacy aliases.
• Fixed execution-limit accounting so cached prompt tokens count toward max_total_tokens for Claude and OpenAI-compatible providers.
• Added regression coverage for cached-token execution limits.

Validation

• cargo fmt --check
• cargo test