Lanweave 0.3.0

What's Changed

• docs: detail v0.3.0 roadmap by @Opperiesen in #65
• feat: define v0.3 adapter contracts by @Opperiesen in #66
• feat: put local client behind adapter boundary by @Opperiesen in #67
• feat: make adapter selection explicit by @Opperiesen in #68
• feat: add read-only Site Manager adapter by @Opperiesen in #69
• feat: expose adapter capabilities to operators by @Opperiesen in #70
• ci: add v0.3 evidence and release gates by @Opperiesen in #71
• release: prepare v0.3.0 by @Opperiesen in #72
• docs: mark v0.3.0 as current roadmap release by @Opperiesen in #73

Full Changelog: v0.2.0...v0.3.0