v0.1.14 — V2/V3 verification gates resolved

[0.1.14] - 2026-05-08

Changed

• Native citations: caching enabled by default. The first
  document in a citations request now carries
  cache_control: {"type": "ephemeral"} — one marker covers
  the entire document prefix per Anthropic's caching semantics.
  Empirically verified by the V2 probe: a 3799-token payload
  yielded full cache hits on the second call
  (cache_read_input_tokens=3799,
  cache_creation_input_tokens=0) with ~29% latency reduction
  (3102ms → 2190ms). No code change for callers; identical
  inputs to RagPipeline.run_and_generate(use_native_citations=True)
  now get cheaper on repeat calls.
• MAX_CITATION_DOCUMENTS: 20 → 200. V3 probe accepted every
  count in {5, 10, 20, 30, 50, 75, 100, 150, 200} without
  rejection; Anthropic's actual cap is higher still. The new
  ceiling gives generous headroom while still surfacing a clean
  ValueError if a caller accidentally tries hundreds.
• Docs (docs/rag/native-citations.md): "Open verification
  gates" section updated to "Verification gates — resolved
  2026-05-08" with the V2 / V3 findings inline. The "Caching"
  and "Document-count ceiling" sections now reflect the
  defaults.

Added

• Verification probes at
  scripts/probe_v2_cache_control.py and
  scripts/probe_v3_doc_count_ceiling.py. Manual one-shot
  scripts that re-run the V2 / V3 verifications against the
  live Anthropic API. Cost ~$0.01 each. Useful when the SDK or
  service contract may have changed.