v2.4.0 - True RAG

🧠 True RAG (Retrieval-Augmented Generation)

The -l flag now implements true RAG - your local documents become AI context.

How It Works

# 1. Build your knowledge base
pplx --ingest notes.md
pplx --ingest ./research/

# 2. Ask questions with local context
pplx -l "explain my notes on rust"
# [local] Found 2 relevant doc(s), using as context...
# [sonar] Based on your notes, Rust is...

What Changed

Before: -l just searched and printed results, then exited
After: -l searches → injects top matches as context → sends to Perplexity → streams AI answer

Technical Details

• SQLite FTS5 with BM25 ranking finds most relevant docs
• Top 3 matches injected as context (4000 char limit)
• UTF-8 safe truncation (won't break emojis)
• Cost-efficient: only sends relevant content, not entire knowledge base

New Tests

• 41 tests (up from 37)
• Coverage for RAG truncation, Unicode handling, OR queries

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Full Changelog: v2.3.1...v2.4.0