The recall API already supports `include: {chunks}`, and the TypeScript
client already exposes it as `includeChunks`/`maxChunkTokens`, but the
agent tool forwarded only `{maxTokens, types}` — so an agent had no way
to reach the raw source text a fact was extracted from, which is exactly
what "what did we actually say" questions need.
Add optional `include_chunks` / `max_chunk_tokens` parameters and pass
them through. Both are additive and off by default, so recall responses
are unchanged unless an agent asks for chunks.
Fixes#2949
chethanuk
cd40649393