v0.2.1

• Package 0.2.1. Docs only. No new MEASURED run and no new SIMULATED cohort. The SIMULATED report package line and docs/voice/latency_simulated.json version match 0.2.1. The tables stay the bdd841a regeneration (package 0.2.0).
• Docs. README section "Business value" and docs/BUSINESS_VALUE.md (English value-realization plan). Business figures there are [SYN] unless marked [REPO] or [REPO-EST].
• The 49-call SIMULATED percentiles stay the 0.1.9 publication (4fb26ef, 2026-10-17). They were not re-measured as a 0.2.0 result. docs/voice/SIMULATED_LATENCY.md now records the commit and Python version of the regeneration that matched those 0.2.0 tables (bdd841a, Python 3.12.3).
• README live p95 cells are marked as rounded to 0.1 ms from docs/live/2026-10-17-results.json. The stored live end-to-end p95 is above the lab 2500 ms budget, and the live TTS first-byte p95 (380.05 ms) is above the 250 ms TTS TTFB budget. Live mode does not apply those budgets. Live end-to-end is full audio; the lab end-to-end budget stops at the first TTS byte. The live failure remains unsupported_availability_claim:S15 (exit 1).
• Next steps no longer asks to fill an empty measured table. That table already holds the 84cfb1a run.
• docs/design/COST_ESTIMATE.md status line is Draft v1. The file is in the public tree.
• One local test run is recorded in the README (Python 3.12.3, 105 passed, 92.97% coverage).