Module transcript 

Claude Code transcript record types and tool-call extraction.

Defines the JSONL record shapes and the shared extractors — ordered ToolInvocations (matching tool_result blocks back to their tool_use by id) and the last assistant text — reused by the claude -p stream-json parser (stream_json). The harness-neutral TranscriptSummary the pipeline consumes lives in crate::adapters::transcript.