v0.1.0b1

What's Changed

• docs: correct provider counts and fix AGENT.md references by @stefan-jansen in #8
• fix: unify AssetClass to single canonical enum by @stefan-jansen in #9
• refactor: unify StorageBackend to single canonical ABC by @stefan-jansen in #10
• refactor: deduplicate provider and storage boilerplate by @stefan-jansen in #11
• refactor: rename QldmError and extract symbol lists to JSON by @stefan-jansen in #12
• docs: beta-readiness documentation overhaul by @stefan-jansen in #13
• fix: macro downloader thread safety and Polars join API by @stefan-jansen in #14

Full Changelog: v0.1.0a11...v0.1.0b1