release: bump 0.2.7 -> 0.3.0 (supersedes PR #61) (#69)

Minor bump (not patch) because the [Unreleased] section since 0.2.7 has
accumulated a sweep of additive changes that justify a new minor:

- Family 9-16 indicator catalogue expansion (Bands & Channels, Trailing
  Stops, Volume, Statistics, Ehlers/Cycle DSP, Pivots, DeMark, Ichimoku,
  Candlestick Patterns, Market Profile, Risk/Performance) — roughly
  100+ new indicators since 0.2.7 across all four bindings.
- New `wickra_core::FAMILIES` const + family-taxonomy guard tests.
- GitHub org migration (kingchenc -> wickra-lib) and new maintainer
  email (wickra.lib@gmail.com).
- New `repo-metadata.toml` + `sync-metadata.yml` audit workflow.
- WASM CI tests now run on every PR (existing tests had been
  manually-only).
- CycloneDX SBOMs + npm provenance attestations attached to releases.
- Three end-to-end strategy examples.
- Governance polish: ARCHITECTURE / ROADMAP / CITATION / FUNDING /
  .editorconfig.
- Curated benchmark suite (~33 representative indicators).
- Three cold-path coverage fixes (mama, rsi, sine_wave).
- bindings/node/package-lock.json now committed.

Workspace + bindings (Rust crate, Python wheel, Node main + 6 platform
sub-packages, WASM) all step to 0.3.0. CHANGELOG opens the [0.3.0]
section dated 2026-05-28 with the full Changed / Added inventory.
Compare-URL block adds the v0.2.7...v0.3.0 line under [Unreleased] and
points [Unreleased] at v0.3.0...HEAD using the new wickra-lib org.

**Supersedes PR #61** (0.2.7 -> 0.2.8 patch bump). Close #61 when this
one merges. Merge ordering remains: #59 (org migration) + #60
(family-api) + the polish PRs first, rebase this PR on top of the new
main, then merge.

Tag-push `v0.3.0` is a SEPARATE, manual step after merge — it triggers
release.yml's irreversible publish to crates.io / PyPI / npm.

Cargo.toml

@@ -12,7 +12,7 @@ members = [
 exclude = ["fuzz"]
 
 [workspace.package]
-version = "0.2.7"
+version = "0.3.0"
 authors = ["kingchenc <wickra.lib@gmail.com>"]
 edition = "2021"
 rust-version = "1.86"
@@ -24,7 +24,7 @@ keywords = ["finance", "trading", "indicators", "technical-analysis", "ta"]
 categories = ["finance", "mathematics", "science"]
 
 [workspace.dependencies]
-wickra-core = { path = "crates/wickra-core", version = "0.2.7" }
+wickra-core = { path = "crates/wickra-core", version = "0.3.0" }
 
 thiserror = "2"
 rayon = "1.10"