- Fixed streaming mode pipeline issues:
  - Fixed n-gram counting to handle partial matches correctly
  - Added per-chunk filtering to prevent duplicate n-grams across chunks

- Optimized regex patterns (~35 patterns pre-compiled):
  - Pre-compiled all regex patterns for better performance
  - Added false positive protection with length-based filtering
  - Optimized tool call parsing in parser.py

- Added grammar-guided generation (--ggg / --grammar-guided-gen):
  - New GBNF grammar file (tool_call_grammar.gbnf) for tool call parsing
  - Grammar loading utilities in models/grammar.py
  - Vulkan backend: Added GBNF grammar support via llama_generate_grammar
  - CUDA backend: Added outlines support for structured output

- Added prompt distillation (--tools-closer-prompt):
  - New CLI option --tools-closer-prompt for prompt distillation
  - Enables generating distilled tool descriptions for better accuracy