Docs-only release. The 2.1.0 doc corrections landed on main in 7a47012 but after
the v2.1.0 tag, so pub.dev's rendered page still shows the pre-fix README. This
bump republishes so the page is current.
No code changes — lib/ is byte-identical to 2.1.0.
- README updated to 2.1.x (install snippet and both "Set up with AI" prompts still
told an assistant to pin ^2.0.0).
- Documented the diagnostic surface: AdBlockReason, AdFlow.onAdBlocked,
controller.lastBlockReason.
- Documented that the global frequency cap never blocks a user-initiated rewarded
ad (ADR-039), and the new RewardedConfig.cap / RewardedInterstitialConfig.cap.
- Corrected a stale SKILL.md trap that would have led the next model to
re-introduce the app-open cold-start latch ADR-043 removed.
dart format clean (0 changed), analyze clean, 313 tests pass.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>