chore: dual-license MIT OR Apache-2.0

The Rust ecosystem convention, and what kickscore, xy and saphyr already use —
kickscore being the closest sibling to this crate.

LICENSE-APACHE is the canonical 201-line Apache-2.0 text with the appendix
left as the unfilled template, which is the form Rust crates ship. LICENSE-MIT
carries the copyright line. Both are picked up by cargo automatically and
appear in the packaged crate.

This also unblocks the release workflow. `cargo publish` does not check the
license field when the target is an alternative registry, but cargo-release
does, and refuses outright:

    error: trueskill-tt is missing the following fields:
             license || license-file

--no-verify does not bypass it. So `just release` was inert without this,
whatever cargo publish alone would have accepted.

README gains the conventional dual-license section and the contribution note
that dedicates inbound contributions under the same terms.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01T5SYDExxL4vZgvunrcNSMc

CHANGELOG.md

@@ -2,6 +2,56 @@
 
 All notable changes to this project will be documented in this file.
 
+## 0.2.0 - 2026-08-27
+
+### Breaking Changes
+
+- refactor!: remove the inert online flag
+
+### Bug Fixes
+
+- fix: reject ties without draw probability; never report NaN as converged
+- fix(quality): support any number of rating groups
+- fix(evidence): accumulate in log space and floor the per-link value
+- fix(history): stop reprocessing the slice that was just appended to
+- fix(rayon): remove the aliasing unsafe from the parallel sweep
+- fix: close out four small issues and pin #27's repro
+
+### Documentation
+
+- docs: refresh README and CLAUDE.md; add ingest benchmark
+- docs: spec for filtered (forward-only) estimates
+- docs: implementation plan for filtered estimates
+- docs: state filtered accessor cost and evidence semantics precisely
+- docs(cargo): correct the licence note — kellnr does not require one
+
+### Features
+
+- feat: add filtered_log_evidence
+- feat: add filtered learning curves
+
+### Miscellaneous Tasks
+
+- chore: add CI, crate metadata, and crate-level documentation
+- chore: target releases at the private kellnr registry
+- chore: keep the 48 MB ATP dataset out of the published crate
+
+### Performance
+
+- perf(gaussian): drop the sqrt round-trip from variance-space operations
+
+### Refactor
+
+- refactor: unify convergence defaults, validate builders, clear dead code
+
+### Styling
+
+- style: make NaN rejection explicit in score_sigma validation
+
+### Testing
+
+- test: pin the invariants that make filtered estimates trustworthy
+
 ## 0.1.2 - 2026-06-12
 
 ### Bug Fixes
@@ -32,6 +82,10 @@ All notable changes to this project will be documented in this file.
 - feat(outcome): per-event score_sigma override on Outcome::Scored
 - feat(event_builder): expose scores_with_sigma fluent method
 
+### Miscellaneous Tasks
+
+- chore: Release trueskill-tt version 0.1.2
+
 ### Refactor
 
 - refactor: dedupe Game::likelihoods and likelihoods_scored via run_chain