Rebuild the Obsidian gateway for mdbase v3

[callumalpass]

Summary

• rebuild the plugin around a first-class Types / Sync / Issues workspace
• add recursive object and list field editing, v0.2 analysis and v0.3 migration
• add hosted collection initialization and writable/read-only Connect mirrors
• treat body-only Markdown as an equal record and preserve exact bytes
• use the mdbase icon with Obsidian accent-color inheritance and native controls
• isolate per-file sync errors instead of stopping a mirror
• consume the exact mdbase-connect v0.1.0-beta.8 protocol and sync SDKs

Verification

• npm run build
• npm test (32 tests)
• npm run check:mobile (480,883 bytes raw / 141,592 gzip)
• installed production bundle in /home/calluma/testvault/test
• profiled schema, migration, validation and issue rendering against 9,013 live Markdown files using the live-vault harness
• confirmed Canvas Bases/Start Here.md stayed byte-identical (60c1040...)

The host Obsidian Electron shell currently stalls before creating any renderer, including in a blank profile without plugins; that host-level fault prevented a final CLI-renderer timing run, but the same full live vault was exercised through the plugin harness and all production artifacts were installed.