v0.3.0-alpha

What's Changed

• feat: Lingua Spherica — Language → SphereQL mapping system by @bkahan in #23
• feat: full E2E example + workspace-wide CodeRabbit fixes by @bkahan in #25
• feat(lingua): add sphereql-lingua NLP-to-coordinates crate + Python bindings by @bkahan in #26
• Full-review remediation: correctness, perf, API stability, docs by @bkahan in #27
• feat: projection overhaul — radial variants, UMAP-on-sphere, group routing, PQ sidecar, E2E comparison by @bkahan in #28
• feat-staging: corpus registry, 500K bulk pipeline, Python/Qdrant e2e by @bkahan in #29
• Consolidate all active branches into main (projection overhaul + metalearning loop) by @bkahan in #31
• v0.3.0 release prep: drift tooling, self-tune bindings, fresh benchmarks, bump to 0.3.0 by @bkahan in #32

Full Changelog: v0.2.0-alpha...v0.3.0-alpha