* feat: add native Rust streaming JSON parser for LLM tool call argument parsing
Replaces the JS partial-json library with a Rust implementation exposed via napi-rs.
The parser handles incomplete JSON from streaming deltas by closing unclosed strings,
objects, arrays, removing trailing commas, and completing truncated literals.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* fix: handle truncated numbers and remove dead partial-json dependency
Adds truncated number recovery (e.g. `{"key": 12`, `{"key": 3.`, `{"key": 1e`)
to the Rust streaming JSON parser, and removes the now-unused `partial-json`
npm dependency from pi-ai.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
